LCOV - code coverage report
Current view: directory - tools/gcc-4.5/include/c++/4.5.2/i686-pc-linux-gnu/bits - gthr-default.h (source / functions) Found Hit Coverage
Test: app.info Lines: 2 0 0.0 %
Date: 2012-06-02 Functions: 1 0 0.0 %

       1                 : /* Threads compatibility routines for libgcc2 and libobjc.  */
       2                 : /* Compile this one with gcc.  */
       3                 : /* Copyright (C) 1997, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
       4                 :    2008, 2009 Free Software Foundation, Inc.
       5                 : 
       6                 : This file is part of GCC.
       7                 : 
       8                 : GCC is free software; you can redistribute it and/or modify it under
       9                 : the terms of the GNU General Public License as published by the Free
      10                 : Software Foundation; either version 3, or (at your option) any later
      11                 : version.
      12                 : 
      13                 : GCC is distributed in the hope that it will be useful, but WITHOUT ANY
      14                 : WARRANTY; without even the implied warranty of MERCHANTABILITY or
      15                 : FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
      16                 : for more details.
      17                 : 
      18                 : Under Section 7 of GPL version 3, you are granted additional
      19                 : permissions described in the GCC Runtime Library Exception, version
      20                 : 3.1, as published by the Free Software Foundation.
      21                 : 
      22                 : You should have received a copy of the GNU General Public License and
      23                 : a copy of the GCC Runtime Library Exception along with this program;
      24                 : see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
      25                 : <http://www.gnu.org/licenses/>.  */
      26                 : 
      27                 : #ifndef _GLIBCXX_GCC_GTHR_POSIX_H
      28                 : #define _GLIBCXX_GCC_GTHR_POSIX_H
      29                 : 
      30                 : /* POSIX threads specific definitions.
      31                 :    Easy, since the interface is just one-to-one mapping.  */
      32                 : 
      33                 : #define __GTHREADS 1
      34                 : #define __GTHREADS_CXX0X 1
      35                 : 
      36                 : /* Some implementations of <pthread.h> require this to be defined.  */
      37                 : #if !defined(_REENTRANT) && defined(__osf__)
      38                 : #define _REENTRANT 1
      39                 : #endif
      40                 : 
      41                 : #include <pthread.h>
      42                 : #include <unistd.h>
      43                 : 
      44                 : typedef pthread_t __gthread_t;
      45                 : typedef pthread_key_t __gthread_key_t;
      46                 : typedef pthread_once_t __gthread_once_t;
      47                 : typedef pthread_mutex_t __gthread_mutex_t;
      48                 : typedef pthread_mutex_t __gthread_recursive_mutex_t;
      49                 : typedef pthread_cond_t __gthread_cond_t;
      50                 : typedef struct timespec __gthread_time_t;
      51                 : 
      52                 : /* POSIX like conditional variables are supported.  Please look at comments
      53                 :    in gthr.h for details. */
      54                 : #define __GTHREAD_HAS_COND      1
      55                 : 
      56                 : #define __GTHREAD_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
      57                 : #define __GTHREAD_ONCE_INIT PTHREAD_ONCE_INIT
      58                 : #if defined(PTHREAD_RECURSIVE_MUTEX_INITIALIZER)
      59                 : #define __GTHREAD_RECURSIVE_MUTEX_INIT PTHREAD_RECURSIVE_MUTEX_INITIALIZER
      60                 : #elif defined(PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP)
      61                 : #define __GTHREAD_RECURSIVE_MUTEX_INIT PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP
      62                 : #else
      63                 : #define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION __gthread_recursive_mutex_init_function
      64                 : #endif
      65                 : #define __GTHREAD_COND_INIT PTHREAD_COND_INITIALIZER
      66                 : #define __GTHREAD_TIME_INIT {0,0}
      67                 : 
      68                 : #if __GXX_WEAK__ && _GLIBCXX_GTHREAD_USE_WEAK
      69                 : # ifndef __gthrw_pragma
      70                 : #  define __gthrw_pragma(pragma)
      71                 : # endif
      72                 : # define __gthrw2(name,name2,type) \
      73                 :   static __typeof(type) name __attribute__ ((__weakref__(#name2))); \
      74                 :   __gthrw_pragma(weak type)
      75                 : # define __gthrw_(name) __gthrw_ ## name
      76                 : #else
      77                 : # define __gthrw2(name,name2,type)
      78                 : # define __gthrw_(name) name
      79                 : #endif
      80                 : 
      81                 : /* Typically, __gthrw_foo is a weak reference to symbol foo.  */
      82                 : #define __gthrw(name) __gthrw2(__gthrw_ ## name,name,name)
      83                 : 
      84                 : /* On Tru64, /usr/include/pthread.h uses #pragma extern_prefix "__" to
      85                 :    map a subset of the POSIX pthread API to mangled versions of their
      86                 :    names.  */
      87                 : #if defined(__osf__) && defined(_PTHREAD_USE_MANGLED_NAMES_)
      88                 : #define __gthrw3(name) __gthrw2(__gthrw_ ## name, __ ## name, name)
      89                 : __gthrw3(pthread_once)
      90                 : __gthrw3(pthread_getspecific)
      91                 : __gthrw3(pthread_setspecific)
      92                 : 
      93                 : __gthrw3(pthread_create)
      94                 : __gthrw3(pthread_join)
      95                 : __gthrw3(pthread_detach)
      96                 : __gthrw3(pthread_equal)
      97                 : __gthrw3(pthread_self)
      98                 : __gthrw3(pthread_cancel)
      99                 : __gthrw3(sched_yield)
     100                 : 
     101                 : __gthrw3(pthread_mutex_lock)
     102                 : __gthrw3(pthread_mutex_trylock)
     103                 : #ifdef _POSIX_TIMEOUTS
     104                 : #if _POSIX_TIMEOUTS >= 0
     105                 : __gthrw3(pthread_mutex_timedlock)
     106                 : #endif
     107                 : #endif /* _POSIX_TIMEOUTS */
     108                 : __gthrw3(pthread_mutex_unlock)
     109                 : __gthrw3(pthread_mutex_init)
     110                 : __gthrw3(pthread_mutex_destroy)
     111                 : 
     112                 : __gthrw3(pthread_cond_broadcast)
     113                 : __gthrw3(pthread_cond_signal)
     114                 : __gthrw3(pthread_cond_wait)
     115                 : __gthrw3(pthread_cond_timedwait)
     116                 : __gthrw3(pthread_cond_destroy)
     117                 : #else
     118                 : __gthrw(pthread_once)
     119                 : __gthrw(pthread_getspecific)
     120                 : __gthrw(pthread_setspecific)
     121                 : 
     122                 : __gthrw(pthread_create)
     123                 : __gthrw(pthread_join)
     124                 : __gthrw(pthread_equal)
     125                 : __gthrw(pthread_self)
     126                 : __gthrw(pthread_detach)
     127                 : __gthrw(pthread_cancel)
     128                 : __gthrw(sched_yield)
     129                 : 
     130                 : __gthrw(pthread_mutex_lock)
     131                 : __gthrw(pthread_mutex_trylock)
     132                 : #ifdef _POSIX_TIMEOUTS
     133                 : #if _POSIX_TIMEOUTS >= 0
     134                 : __gthrw(pthread_mutex_timedlock)
     135                 : #endif
     136                 : #endif /* _POSIX_TIMEOUTS */
     137                 : __gthrw(pthread_mutex_unlock)
     138                 : __gthrw(pthread_mutex_init)
     139                 : __gthrw(pthread_mutex_destroy)
     140                 : 
     141                 : __gthrw(pthread_cond_broadcast)
     142                 : __gthrw(pthread_cond_signal)
     143                 : __gthrw(pthread_cond_wait)
     144                 : __gthrw(pthread_cond_timedwait)
     145                 : __gthrw(pthread_cond_destroy)
     146                 : #endif
     147                 : 
     148                 : __gthrw(pthread_key_create)
     149                 : __gthrw(pthread_key_delete)
     150                 : __gthrw(pthread_mutexattr_init)
     151                 : __gthrw(pthread_mutexattr_settype)
     152                 : __gthrw(pthread_mutexattr_destroy)
     153                 : 
     154                 : 
     155                 : #if defined(_LIBOBJC) || defined(_LIBOBJC_WEAK)
     156                 : /* Objective-C.  */
     157                 : #if defined(__osf__) && defined(_PTHREAD_USE_MANGLED_NAMES_)
     158                 : __gthrw3(pthread_cond_init)
     159                 : __gthrw3(pthread_exit)
     160                 : #else
     161                 : __gthrw(pthread_cond_init)
     162                 : __gthrw(pthread_exit)
     163                 : #endif /* __osf__ && _PTHREAD_USE_MANGLED_NAMES_ */
     164                 : #ifdef _POSIX_PRIORITY_SCHEDULING
     165                 : #ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
     166                 : __gthrw(sched_get_priority_max)
     167                 : __gthrw(sched_get_priority_min)
     168                 : #endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */
     169                 : #endif /* _POSIX_PRIORITY_SCHEDULING */
     170                 : __gthrw(pthread_attr_destroy)
     171                 : __gthrw(pthread_attr_init)
     172                 : __gthrw(pthread_attr_setdetachstate)
     173                 : #ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
     174                 : __gthrw(pthread_getschedparam)
     175                 : __gthrw(pthread_setschedparam)
     176                 : #endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */
     177                 : #endif /* _LIBOBJC || _LIBOBJC_WEAK */
     178                 : 
     179                 : #if __GXX_WEAK__ && _GLIBCXX_GTHREAD_USE_WEAK
     180                 : 
     181                 : /* On Solaris 2.6 up to 9, the libc exposes a POSIX threads interface even if
     182                 :    -pthreads is not specified.  The functions are dummies and most return an
     183                 :    error value.  However pthread_once returns 0 without invoking the routine
     184                 :    it is passed so we cannot pretend that the interface is active if -pthreads
     185                 :    is not specified.  On Solaris 2.5.1, the interface is not exposed at all so
     186                 :    we need to play the usual game with weak symbols.  On Solaris 10 and up, a
     187                 :    working interface is always exposed.  On FreeBSD 6 and later, libc also
     188                 :    exposes a dummy POSIX threads interface, similar to what Solaris 2.6 up
     189                 :    to 9 does.  FreeBSD >= 700014 even provides a pthread_cancel stub in libc,
     190                 :    which means the alternate __gthread_active_p below cannot be used there.  */
     191                 : 
     192                 : #if defined(__FreeBSD__) || (defined(__sun) && defined(__svr4__))
     193                 : 
     194                 : static volatile int __gthread_active = -1;
     195                 : 
     196                 : static void
     197                 : __gthread_trigger (void)
     198                 : {
     199                 :   __gthread_active = 1;
     200                 : }
     201                 : 
     202                 : static inline int
     203                 : __gthread_active_p (void)
     204                 : {
     205                 :   static pthread_mutex_t __gthread_active_mutex = PTHREAD_MUTEX_INITIALIZER;
     206                 :   static pthread_once_t __gthread_active_once = PTHREAD_ONCE_INIT;
     207                 : 
     208                 :   /* Avoid reading __gthread_active twice on the main code path.  */
     209                 :   int __gthread_active_latest_value = __gthread_active;
     210                 : 
     211                 :   /* This test is not protected to avoid taking a lock on the main code
     212                 :      path so every update of __gthread_active in a threaded program must
     213                 :      be atomic with regard to the result of the test.  */
     214                 :   if (__builtin_expect (__gthread_active_latest_value < 0, 0))
     215                 :     {
     216                 :       if (__gthrw_(pthread_once))
     217                 :         {
     218                 :           /* If this really is a threaded program, then we must ensure that
     219                 :              __gthread_active has been set to 1 before exiting this block.  */
     220                 :           __gthrw_(pthread_mutex_lock) (&__gthread_active_mutex);
     221                 :           __gthrw_(pthread_once) (&__gthread_active_once, __gthread_trigger);
     222                 :           __gthrw_(pthread_mutex_unlock) (&__gthread_active_mutex);
     223                 :         }
     224                 : 
     225                 :       /* Make sure we'll never enter this block again.  */
     226                 :       if (__gthread_active < 0)
     227                 :         __gthread_active = 0;
     228                 : 
     229                 :       __gthread_active_latest_value = __gthread_active;
     230                 :     }
     231                 : 
     232                 :   return __gthread_active_latest_value != 0;
     233                 : }
     234                 : 
     235                 : #else /* neither FreeBSD nor Solaris */
     236                 : 
     237                 : static inline int
     238               0 : __gthread_active_p (void)
     239                 : {
     240                 :   static void *const __gthread_active_ptr
     241                 :     = __extension__ (void *) &__gthrw_(pthread_cancel);
     242               0 :   return __gthread_active_ptr != 0;
     243                 : }
     244                 : 
     245                 : #endif /* FreeBSD or Solaris */
     246                 : 
     247                 : #else /* not __GXX_WEAK__ */
     248                 : 
     249                 : /* Similar to Solaris, HP-UX 11 for PA-RISC provides stubs for pthread
     250                 :    calls in shared flavors of the HP-UX C library.  Most of the stubs
     251                 :    have no functionality.  The details are described in the "libc cumulative
     252                 :    patch" for each subversion of HP-UX 11.  There are two special interfaces
     253                 :    provided for checking whether an application is linked to a pthread
     254                 :    library or not.  However, these interfaces aren't available in early
     255                 :    libc versions.  We also can't use pthread_once as some libc versions
     256                 :    call the init function.  So, we use pthread_create to check whether it
     257                 :    is possible to create a thread or not.  The stub implementation returns
     258                 :    the error number ENOSYS.  */
     259                 : 
     260                 : #if defined(__hppa__) && defined(__hpux__)
     261                 : 
     262                 : #include <errno.h>
     263                 : 
     264                 : static volatile int __gthread_active = -1;
     265                 : 
     266                 : static void *
     267                 : __gthread_start (void *__arg __attribute__((unused)))
     268                 : {
     269                 :   return NULL;
     270                 : }
     271                 : 
     272                 : static void __gthread_active_init (void) __attribute__((noinline));
     273                 : static void
     274                 : __gthread_active_init (void)
     275                 : {
     276                 :   static pthread_mutex_t __gthread_active_mutex = PTHREAD_MUTEX_INITIALIZER;
     277                 :   pthread_t __t;
     278                 :   pthread_attr_t __a;
     279                 :   int __result;
     280                 : 
     281                 :   __gthrw_(pthread_mutex_lock) (&__gthread_active_mutex);
     282                 :   if (__gthread_active < 0)
     283                 :     {
     284                 :       __gthrw_(pthread_attr_init) (&__a);
     285                 :       __gthrw_(pthread_attr_setdetachstate) (&__a, PTHREAD_CREATE_DETACHED);
     286                 :       __result = __gthrw_(pthread_create) (&__t, &__a, __gthread_start, NULL);
     287                 :       if (__result != ENOSYS)
     288                 :         __gthread_active = 1;
     289                 :       else
     290                 :         __gthread_active = 0;
     291                 :       __gthrw_(pthread_attr_destroy) (&__a);
     292                 :     }
     293                 :   __gthrw_(pthread_mutex_unlock) (&__gthread_active_mutex);
     294                 : }
     295                 : 
     296                 : static inline int
     297                 : __gthread_active_p (void)
     298                 : {
     299                 :   /* Avoid reading __gthread_active twice on the main code path.  */
     300                 :   int __gthread_active_latest_value = __gthread_active;
     301                 : 
     302                 :   /* This test is not protected to avoid taking a lock on the main code
     303                 :      path so every update of __gthread_active in a threaded program must
     304                 :      be atomic with regard to the result of the test.  */
     305                 :   if (__builtin_expect (__gthread_active_latest_value < 0, 0))
     306                 :     {
     307                 :       __gthread_active_init ();
     308                 :       __gthread_active_latest_value = __gthread_active;
     309                 :     }
     310                 : 
     311                 :   return __gthread_active_latest_value != 0;
     312                 : }
     313                 : 
     314                 : #else /* not hppa-hpux */
     315                 : 
     316                 : static inline int
     317                 : __gthread_active_p (void)
     318                 : {
     319                 :   return 1;
     320                 : }
     321                 : 
     322                 : #endif /* hppa-hpux */
     323                 : 
     324                 : #endif /* __GXX_WEAK__ */
     325                 : 
     326                 : #ifdef _LIBOBJC
     327                 : 
     328                 : /* This is the config.h file in libobjc/ */
     329                 : #include <config.h>
     330                 : 
     331                 : #ifdef HAVE_SCHED_H
     332                 : # include <sched.h>
     333                 : #endif
     334                 : 
     335                 : /* Key structure for maintaining thread specific storage */
     336                 : static pthread_key_t _objc_thread_storage;
     337                 : static pthread_attr_t _objc_thread_attribs;
     338                 : 
     339                 : /* Thread local storage for a single thread */
     340                 : static void *thread_local_storage = NULL;
     341                 : 
     342                 : /* Backend initialization functions */
     343                 : 
     344                 : /* Initialize the threads subsystem.  */
     345                 : static inline int
     346                 : __gthread_objc_init_thread_system (void)
     347                 : {
     348                 :   if (__gthread_active_p ())
     349                 :     {
     350                 :       /* Initialize the thread storage key.  */
     351                 :       if (__gthrw_(pthread_key_create) (&_objc_thread_storage, NULL) == 0)
     352                 :         {
     353                 :           /* The normal default detach state for threads is
     354                 :            * PTHREAD_CREATE_JOINABLE which causes threads to not die
     355                 :            * when you think they should.  */
     356                 :           if (__gthrw_(pthread_attr_init) (&_objc_thread_attribs) == 0
     357                 :               && __gthrw_(pthread_attr_setdetachstate) (&_objc_thread_attribs,
     358                 :                                               PTHREAD_CREATE_DETACHED) == 0)
     359                 :             return 0;
     360                 :         }
     361                 :     }
     362                 : 
     363                 :   return -1;
     364                 : }
     365                 : 
     366                 : /* Close the threads subsystem.  */
     367                 : static inline int
     368                 : __gthread_objc_close_thread_system (void)
     369                 : {
     370                 :   if (__gthread_active_p ()
     371                 :       && __gthrw_(pthread_key_delete) (_objc_thread_storage) == 0
     372                 :       && __gthrw_(pthread_attr_destroy) (&_objc_thread_attribs) == 0)
     373                 :     return 0;
     374                 : 
     375                 :   return -1;
     376                 : }
     377                 : 
     378                 : /* Backend thread functions */
     379                 : 
     380                 : /* Create a new thread of execution.  */
     381                 : static inline objc_thread_t
     382                 : __gthread_objc_thread_detach (void (*func)(void *), void *arg)
     383                 : {
     384                 :   objc_thread_t thread_id;
     385                 :   pthread_t new_thread_handle;
     386                 : 
     387                 :   if (!__gthread_active_p ())
     388                 :     return NULL;
     389                 : 
     390                 :   if (!(__gthrw_(pthread_create) (&new_thread_handle, NULL, (void *) func, arg)))
     391                 :     thread_id = (objc_thread_t) new_thread_handle;
     392                 :   else
     393                 :     thread_id = NULL;
     394                 : 
     395                 :   return thread_id;
     396                 : }
     397                 : 
     398                 : /* Set the current thread's priority.  */
     399                 : static inline int
     400                 : __gthread_objc_thread_set_priority (int priority)
     401                 : {
     402                 :   if (!__gthread_active_p ())
     403                 :     return -1;
     404                 :   else
     405                 :     {
     406                 : #ifdef _POSIX_PRIORITY_SCHEDULING
     407                 : #ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
     408                 :       pthread_t thread_id = __gthrw_(pthread_self) ();
     409                 :       int policy;
     410                 :       struct sched_param params;
     411                 :       int priority_min, priority_max;
     412                 : 
     413                 :       if (__gthrw_(pthread_getschedparam) (thread_id, &policy, &params) == 0)
     414                 :         {
     415                 :           if ((priority_max = __gthrw_(sched_get_priority_max) (policy)) == -1)
     416                 :             return -1;
     417                 : 
     418                 :           if ((priority_min = __gthrw_(sched_get_priority_min) (policy)) == -1)
     419                 :             return -1;
     420                 : 
     421                 :           if (priority > priority_max)
     422                 :             priority = priority_max;
     423                 :           else if (priority < priority_min)
     424                 :             priority = priority_min;
     425                 :           params.sched_priority = priority;
     426                 : 
     427                 :           /*
     428                 :            * The solaris 7 and several other man pages incorrectly state that
     429                 :            * this should be a pointer to policy but pthread.h is universally
     430                 :            * at odds with this.
     431                 :            */
     432                 :           if (__gthrw_(pthread_setschedparam) (thread_id, policy, &params) == 0)
     433                 :             return 0;
     434                 :         }
     435                 : #endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */
     436                 : #endif /* _POSIX_PRIORITY_SCHEDULING */
     437                 :       return -1;
     438                 :     }
     439                 : }
     440                 : 
     441                 : /* Return the current thread's priority.  */
     442                 : static inline int
     443                 : __gthread_objc_thread_get_priority (void)
     444                 : {
     445                 : #ifdef _POSIX_PRIORITY_SCHEDULING
     446                 : #ifdef _POSIX_THREAD_PRIORITY_SCHEDULING
     447                 :   if (__gthread_active_p ())
     448                 :     {
     449                 :       int policy;
     450                 :       struct sched_param params;
     451                 : 
     452                 :       if (__gthrw_(pthread_getschedparam) (__gthrw_(pthread_self) (), &policy, &params) == 0)
     453                 :         return params.sched_priority;
     454                 :       else
     455                 :         return -1;
     456                 :     }
     457                 :   else
     458                 : #endif /* _POSIX_THREAD_PRIORITY_SCHEDULING */
     459                 : #endif /* _POSIX_PRIORITY_SCHEDULING */
     460                 :     return OBJC_THREAD_INTERACTIVE_PRIORITY;
     461                 : }
     462                 : 
     463                 : /* Yield our process time to another thread.  */
     464                 : static inline void
     465                 : __gthread_objc_thread_yield (void)
     466                 : {
     467                 :   if (__gthread_active_p ())
     468                 :     __gthrw_(sched_yield) ();
     469                 : }
     470                 : 
     471                 : /* Terminate the current thread.  */
     472                 : static inline int
     473                 : __gthread_objc_thread_exit (void)
     474                 : {
     475                 :   if (__gthread_active_p ())
     476                 :     /* exit the thread */
     477                 :     __gthrw_(pthread_exit) (&__objc_thread_exit_status);
     478                 : 
     479                 :   /* Failed if we reached here */
     480                 :   return -1;
     481                 : }
     482                 : 
     483                 : /* Returns an integer value which uniquely describes a thread.  */
     484                 : static inline objc_thread_t
     485                 : __gthread_objc_thread_id (void)
     486                 : {
     487                 :   if (__gthread_active_p ())
     488                 :     return (objc_thread_t) __gthrw_(pthread_self) ();
     489                 :   else
     490                 :     return (objc_thread_t) 1;
     491                 : }
     492                 : 
     493                 : /* Sets the thread's local storage pointer.  */
     494                 : static inline int
     495                 : __gthread_objc_thread_set_data (void *value)
     496                 : {
     497                 :   if (__gthread_active_p ())
     498                 :     return __gthrw_(pthread_setspecific) (_objc_thread_storage, value);
     499                 :   else
     500                 :     {
     501                 :       thread_local_storage = value;
     502                 :       return 0;
     503                 :     }
     504                 : }
     505                 : 
     506                 : /* Returns the thread's local storage pointer.  */
     507                 : static inline void *
     508                 : __gthread_objc_thread_get_data (void)
     509                 : {
     510                 :   if (__gthread_active_p ())
     511                 :     return __gthrw_(pthread_getspecific) (_objc_thread_storage);
     512                 :   else
     513                 :     return thread_local_storage;
     514                 : }
     515                 : 
     516                 : /* Backend mutex functions */
     517                 : 
     518                 : /* Allocate a mutex.  */
     519                 : static inline int
     520                 : __gthread_objc_mutex_allocate (objc_mutex_t mutex)
     521                 : {
     522                 :   if (__gthread_active_p ())
     523                 :     {
     524                 :       mutex->backend = objc_malloc (sizeof (pthread_mutex_t));
     525                 : 
     526                 :       if (__gthrw_(pthread_mutex_init) ((pthread_mutex_t *) mutex->backend, NULL))
     527                 :         {
     528                 :           objc_free (mutex->backend);
     529                 :           mutex->backend = NULL;
     530                 :           return -1;
     531                 :         }
     532                 :     }
     533                 : 
     534                 :   return 0;
     535                 : }
     536                 : 
     537                 : /* Deallocate a mutex.  */
     538                 : static inline int
     539                 : __gthread_objc_mutex_deallocate (objc_mutex_t mutex)
     540                 : {
     541                 :   if (__gthread_active_p ())
     542                 :     {
     543                 :       int count;
     544                 : 
     545                 :       /*
     546                 :        * Posix Threads specifically require that the thread be unlocked
     547                 :        * for __gthrw_(pthread_mutex_destroy) to work.
     548                 :        */
     549                 : 
     550                 :       do
     551                 :         {
     552                 :           count = __gthrw_(pthread_mutex_unlock) ((pthread_mutex_t *) mutex->backend);
     553                 :           if (count < 0)
     554                 :             return -1;
     555                 :         }
     556                 :       while (count);
     557                 : 
     558                 :       if (__gthrw_(pthread_mutex_destroy) ((pthread_mutex_t *) mutex->backend))
     559                 :         return -1;
     560                 : 
     561                 :       objc_free (mutex->backend);
     562                 :       mutex->backend = NULL;
     563                 :     }
     564                 :   return 0;
     565                 : }
     566                 : 
     567                 : /* Grab a lock on a mutex.  */
     568                 : static inline int
     569                 : __gthread_objc_mutex_lock (objc_mutex_t mutex)
     570                 : {
     571                 :   if (__gthread_active_p ()
     572                 :       && __gthrw_(pthread_mutex_lock) ((pthread_mutex_t *) mutex->backend) != 0)
     573                 :     {
     574                 :       return -1;
     575                 :     }
     576                 : 
     577                 :   return 0;
     578                 : }
     579                 : 
     580                 : /* Try to grab a lock on a mutex.  */
     581                 : static inline int
     582                 : __gthread_objc_mutex_trylock (objc_mutex_t mutex)
     583                 : {
     584                 :   if (__gthread_active_p ()
     585                 :       && __gthrw_(pthread_mutex_trylock) ((pthread_mutex_t *) mutex->backend) != 0)
     586                 :     {
     587                 :       return -1;
     588                 :     }
     589                 : 
     590                 :   return 0;
     591                 : }
     592                 : 
     593                 : /* Unlock the mutex */
     594                 : static inline int
     595                 : __gthread_objc_mutex_unlock (objc_mutex_t mutex)
     596                 : {
     597                 :   if (__gthread_active_p ()
     598                 :       && __gthrw_(pthread_mutex_unlock) ((pthread_mutex_t *) mutex->backend) != 0)
     599                 :     {
     600                 :       return -1;
     601                 :     }
     602                 : 
     603                 :   return 0;
     604                 : }
     605                 : 
     606                 : /* Backend condition mutex functions */
     607                 : 
     608                 : /* Allocate a condition.  */
     609                 : static inline int
     610                 : __gthread_objc_condition_allocate (objc_condition_t condition)
     611                 : {
     612                 :   if (__gthread_active_p ())
     613                 :     {
     614                 :       condition->backend = objc_malloc (sizeof (pthread_cond_t));
     615                 : 
     616                 :       if (__gthrw_(pthread_cond_init) ((pthread_cond_t *) condition->backend, NULL))
     617                 :         {
     618                 :           objc_free (condition->backend);
     619                 :           condition->backend = NULL;
     620                 :           return -1;
     621                 :         }
     622                 :     }
     623                 : 
     624                 :   return 0;
     625                 : }
     626                 : 
     627                 : /* Deallocate a condition.  */
     628                 : static inline int
     629                 : __gthread_objc_condition_deallocate (objc_condition_t condition)
     630                 : {
     631                 :   if (__gthread_active_p ())
     632                 :     {
     633                 :       if (__gthrw_(pthread_cond_destroy) ((pthread_cond_t *) condition->backend))
     634                 :         return -1;
     635                 : 
     636                 :       objc_free (condition->backend);
     637                 :       condition->backend = NULL;
     638                 :     }
     639                 :   return 0;
     640                 : }
     641                 : 
     642                 : /* Wait on the condition */
     643                 : static inline int
     644                 : __gthread_objc_condition_wait (objc_condition_t condition, objc_mutex_t mutex)
     645                 : {
     646                 :   if (__gthread_active_p ())
     647                 :     return __gthrw_(pthread_cond_wait) ((pthread_cond_t *) condition->backend,
     648                 :                               (pthread_mutex_t *) mutex->backend);
     649                 :   else
     650                 :     return 0;
     651                 : }
     652                 : 
     653                 : /* Wake up all threads waiting on this condition.  */
     654                 : static inline int
     655                 : __gthread_objc_condition_broadcast (objc_condition_t condition)
     656                 : {
     657                 :   if (__gthread_active_p ())
     658                 :     return __gthrw_(pthread_cond_broadcast) ((pthread_cond_t *) condition->backend);
     659                 :   else
     660                 :     return 0;
     661                 : }
     662                 : 
     663                 : /* Wake up one thread waiting on this condition.  */
     664                 : static inline int
     665                 : __gthread_objc_condition_signal (objc_condition_t condition)
     666                 : {
     667                 :   if (__gthread_active_p ())
     668                 :     return __gthrw_(pthread_cond_signal) ((pthread_cond_t *) condition->backend);
     669                 :   else
     670                 :     return 0;
     671                 : }
     672                 : 
     673                 : #else /* _LIBOBJC */
     674                 : 
     675                 : static inline int
     676                 : __gthread_create (__gthread_t *__threadid, void *(*__func) (void*),
     677                 :                   void *__args)
     678                 : {
     679                 :   return __gthrw_(pthread_create) (__threadid, NULL, __func, __args);
     680                 : }
     681                 : 
     682                 : static inline int
     683                 : __gthread_join (__gthread_t __threadid, void **__value_ptr)
     684                 : {
     685                 :   return __gthrw_(pthread_join) (__threadid, __value_ptr);
     686                 : }
     687                 : 
     688                 : static inline int
     689                 : __gthread_detach (__gthread_t __threadid)
     690                 : {
     691                 :   return __gthrw_(pthread_detach) (__threadid);
     692                 : }
     693                 : 
     694                 : static inline int
     695                 : __gthread_equal (__gthread_t __t1, __gthread_t __t2)
     696                 : {
     697                 :   return __gthrw_(pthread_equal) (__t1, __t2);
     698                 : }
     699                 : 
     700                 : static inline __gthread_t
     701                 : __gthread_self (void)
     702                 : {
     703                 :   return __gthrw_(pthread_self) ();
     704                 : }
     705                 : 
     706                 : static inline int
     707                 : __gthread_yield (void)
     708                 : {
     709                 :   return __gthrw_(sched_yield) ();
     710                 : }
     711                 : 
     712                 : static inline int
     713                 : __gthread_once (__gthread_once_t *__once, void (*__func) (void))
     714                 : {
     715                 :   if (__gthread_active_p ())
     716                 :     return __gthrw_(pthread_once) (__once, __func);
     717                 :   else
     718                 :     return -1;
     719                 : }
     720                 : 
     721                 : static inline int
     722                 : __gthread_key_create (__gthread_key_t *__key, void (*__dtor) (void *))
     723                 : {
     724                 :   return __gthrw_(pthread_key_create) (__key, __dtor);
     725                 : }
     726                 : 
     727                 : static inline int
     728                 : __gthread_key_delete (__gthread_key_t __key)
     729                 : {
     730                 :   return __gthrw_(pthread_key_delete) (__key);
     731                 : }
     732                 : 
     733                 : static inline void *
     734                 : __gthread_getspecific (__gthread_key_t __key)
     735                 : {
     736                 :   return __gthrw_(pthread_getspecific) (__key);
     737                 : }
     738                 : 
     739                 : static inline int
     740                 : __gthread_setspecific (__gthread_key_t __key, const void *__ptr)
     741                 : {
     742                 :   return __gthrw_(pthread_setspecific) (__key, __ptr);
     743                 : }
     744                 : 
     745                 : static inline int
     746                 : __gthread_mutex_destroy (__gthread_mutex_t *__mutex)
     747                 : {
     748                 :   if (__gthread_active_p ())
     749                 :     return __gthrw_(pthread_mutex_destroy) (__mutex);
     750                 :   else
     751                 :     return 0;
     752                 : }
     753                 : 
     754                 : static inline int
     755                 : __gthread_mutex_lock (__gthread_mutex_t *__mutex)
     756                 : {
     757                 :   if (__gthread_active_p ())
     758                 :     return __gthrw_(pthread_mutex_lock) (__mutex);
     759                 :   else
     760                 :     return 0;
     761                 : }
     762                 : 
     763                 : static inline int
     764                 : __gthread_mutex_trylock (__gthread_mutex_t *__mutex)
     765                 : {
     766                 :   if (__gthread_active_p ())
     767                 :     return __gthrw_(pthread_mutex_trylock) (__mutex);
     768                 :   else
     769                 :     return 0;
     770                 : }
     771                 : 
     772                 : #ifdef _POSIX_TIMEOUTS
     773                 : #if _POSIX_TIMEOUTS >= 0
     774                 : static inline int
     775                 : __gthread_mutex_timedlock (__gthread_mutex_t *__mutex,
     776                 :                            const __gthread_time_t *__abs_timeout)
     777                 : {
     778                 :   if (__gthread_active_p ())
     779                 :     return __gthrw_(pthread_mutex_timedlock) (__mutex, __abs_timeout);
     780                 :   else
     781                 :     return 0;
     782                 : }
     783                 : #endif
     784                 : #endif
     785                 : 
     786                 : static inline int
     787                 : __gthread_mutex_unlock (__gthread_mutex_t *__mutex)
     788                 : {
     789                 :   if (__gthread_active_p ())
     790                 :     return __gthrw_(pthread_mutex_unlock) (__mutex);
     791                 :   else
     792                 :     return 0;
     793                 : }
     794                 : 
     795                 : #ifndef PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP
     796                 : static inline int
     797                 : __gthread_recursive_mutex_init_function (__gthread_recursive_mutex_t *__mutex)
     798                 : {
     799                 :   if (__gthread_active_p ())
     800                 :     {
     801                 :       pthread_mutexattr_t __attr;
     802                 :       int __r;
     803                 : 
     804                 :       __r = __gthrw_(pthread_mutexattr_init) (&__attr);
     805                 :       if (!__r)
     806                 :         __r = __gthrw_(pthread_mutexattr_settype) (&__attr,
     807                 :                                                    PTHREAD_MUTEX_RECURSIVE);
     808                 :       if (!__r)
     809                 :         __r = __gthrw_(pthread_mutex_init) (__mutex, &__attr);
     810                 :       if (!__r)
     811                 :         __r = __gthrw_(pthread_mutexattr_destroy) (&__attr);
     812                 :       return __r;
     813                 :     }
     814                 :   return 0;
     815                 : }
     816                 : #endif
     817                 : 
     818                 : static inline int
     819                 : __gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *__mutex)
     820                 : {
     821                 :   return __gthread_mutex_lock (__mutex);
     822                 : }
     823                 : 
     824                 : static inline int
     825                 : __gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *__mutex)
     826                 : {
     827                 :   return __gthread_mutex_trylock (__mutex);
     828                 : }
     829                 : 
     830                 : #ifdef _POSIX_TIMEOUTS
     831                 : #if _POSIX_TIMEOUTS >= 0
     832                 : static inline int
     833                 : __gthread_recursive_mutex_timedlock (__gthread_recursive_mutex_t *__mutex,
     834                 :                                      const __gthread_time_t *__abs_timeout)
     835                 : {
     836                 :   return __gthread_mutex_timedlock (__mutex, __abs_timeout);
     837                 : }
     838                 : #endif
     839                 : #endif
     840                 : 
     841                 : static inline int
     842                 : __gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *__mutex)
     843                 : {
     844                 :   return __gthread_mutex_unlock (__mutex);
     845                 : }
     846                 : 
     847                 : static inline int
     848                 : __gthread_cond_broadcast (__gthread_cond_t *__cond)
     849                 : {
     850                 :   return __gthrw_(pthread_cond_broadcast) (__cond);
     851                 : }
     852                 : 
     853                 : static inline int
     854                 : __gthread_cond_signal (__gthread_cond_t *__cond)
     855                 : {
     856                 :   return __gthrw_(pthread_cond_signal) (__cond);
     857                 : }
     858                 : 
     859                 : static inline int
     860                 : __gthread_cond_wait (__gthread_cond_t *__cond, __gthread_mutex_t *__mutex)
     861                 : {
     862                 :   return __gthrw_(pthread_cond_wait) (__cond, __mutex);
     863                 : }
     864                 : 
     865                 : static inline int
     866                 : __gthread_cond_timedwait (__gthread_cond_t *__cond, __gthread_mutex_t *__mutex,
     867                 :                           const __gthread_time_t *__abs_timeout)
     868                 : {
     869                 :   return __gthrw_(pthread_cond_timedwait) (__cond, __mutex, __abs_timeout);
     870                 : }
     871                 : 
     872                 : static inline int
     873                 : __gthread_cond_wait_recursive (__gthread_cond_t *__cond,
     874                 :                                __gthread_recursive_mutex_t *__mutex)
     875                 : {
     876                 :   return __gthread_cond_wait (__cond, __mutex);
     877                 : }
     878                 : 
     879                 : static inline int
     880                 : __gthread_cond_timedwait_recursive (__gthread_cond_t *__cond,
     881                 :                                     __gthread_recursive_mutex_t *__mutex,
     882                 :                                     const __gthread_time_t *__abs_timeout)
     883                 : {
     884                 :   return __gthread_cond_timedwait (__cond, __mutex, __abs_timeout);
     885                 : }
     886                 : 
     887                 : static inline int
     888                 : __gthread_cond_destroy (__gthread_cond_t* __cond)
     889                 : {
     890                 :   return __gthrw_(pthread_cond_destroy) (__cond);
     891                 : }
     892                 : 
     893                 : #endif /* _LIBOBJC */
     894                 : 
     895                 : #endif /* ! _GLIBCXX_GCC_GTHR_POSIX_H */

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