1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /* ***** BEGIN LICENSE BLOCK *****
3 : * Version: MPL 1.1/GPL 2.0/LGPL 2.1
4 : *
5 : * The contents of this file are subject to the Mozilla Public License Version
6 : * 1.1 (the "License"); you may not use this file except in compliance with
7 : * the License. You may obtain a copy of the License at
8 : * http://www.mozilla.org/MPL/
9 : *
10 : * Software distributed under the License is distributed on an "AS IS" basis,
11 : * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
12 : * for the specific language governing rights and limitations under the
13 : * License.
14 : *
15 : * The Original Code is mozilla.org code.
16 : *
17 : * The Initial Developer of the Original Code is
18 : * Netscape Communications Corporation.
19 : * Portions created by the Initial Developer are Copyright (C) 1998
20 : * the Initial Developer. All Rights Reserved.
21 : *
22 : * Contributor(s):
23 : *
24 : * Alternatively, the contents of this file may be used under the terms of
25 : * either of the GNU General Public License Version 2 or later (the "GPL"),
26 : * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
27 : * in which case the provisions of the GPL or the LGPL are applicable instead
28 : * of those above. If you wish to allow use of your version of this file only
29 : * under the terms of either the GPL or the LGPL, and not to allow others to
30 : * use your version of this file under the terms of the MPL, indicate your
31 : * decision by deleting the provisions above and replace them with the notice
32 : * and other provisions required by the GPL or the LGPL. If you do not delete
33 : * the provisions above, a recipient may use your version of this file under
34 : * the terms of any one of the MPL, the GPL or the LGPL.
35 : *
36 : * ***** END LICENSE BLOCK ***** */
37 :
38 : #include "nsXPCOM.h"
39 : #include "nsMemoryImpl.h"
40 : #include "nsThreadUtils.h"
41 :
42 : #include "nsIObserver.h"
43 : #include "nsIObserverService.h"
44 : #include "nsIServiceManager.h"
45 : #include "nsISupportsArray.h"
46 :
47 : #include "prmem.h"
48 : #include "prcvar.h"
49 : #include "pratom.h"
50 :
51 : #include "nsAlgorithm.h"
52 : #include "nsCOMPtr.h"
53 : #include "nsString.h"
54 : #include "mozilla/Services.h"
55 :
56 1464 : static nsMemoryImpl sGlobalMemory;
57 :
58 26450 : NS_IMPL_QUERY_INTERFACE1(nsMemoryImpl, nsIMemory)
59 :
60 : NS_IMETHODIMP_(void*)
61 3682988 : nsMemoryImpl::Alloc(PRSize size)
62 : {
63 3682988 : return NS_Alloc(size);
64 : }
65 :
66 : NS_IMETHODIMP_(void*)
67 8121 : nsMemoryImpl::Realloc(void* ptr, PRSize size)
68 : {
69 8121 : return NS_Realloc(ptr, size);
70 : }
71 :
72 : NS_IMETHODIMP_(void)
73 3682986 : nsMemoryImpl::Free(void* ptr)
74 : {
75 3682986 : NS_Free(ptr);
76 3682986 : }
77 :
78 : NS_IMETHODIMP
79 0 : nsMemoryImpl::HeapMinimize(bool aImmediate)
80 : {
81 0 : return FlushMemory(NS_LITERAL_STRING("heap-minimize").get(), aImmediate);
82 : }
83 :
84 : NS_IMETHODIMP
85 0 : nsMemoryImpl::IsLowMemory(bool *result)
86 : {
87 0 : NS_ERROR("IsLowMemory is deprecated. See bug 592308.");
88 0 : *result = false;
89 0 : return NS_OK;
90 : }
91 :
92 : /*static*/ nsresult
93 0 : nsMemoryImpl::Create(nsISupports* outer, const nsIID& aIID, void **aResult)
94 : {
95 0 : NS_ENSURE_NO_AGGREGATION(outer);
96 0 : return sGlobalMemory.QueryInterface(aIID, aResult);
97 : }
98 :
99 : nsresult
100 0 : nsMemoryImpl::FlushMemory(const PRUnichar* aReason, bool aImmediate)
101 : {
102 0 : nsresult rv = NS_OK;
103 :
104 0 : if (aImmediate) {
105 : // They've asked us to run the flusher *immediately*. We've
106 : // got to be on the UI main thread for us to be able to do
107 : // that...are we?
108 0 : if (!NS_IsMainThread()) {
109 0 : NS_ERROR("can't synchronously flush memory: not on UI thread");
110 0 : return NS_ERROR_FAILURE;
111 : }
112 : }
113 :
114 0 : PRInt32 lastVal = PR_ATOMIC_SET(&sIsFlushing, 1);
115 0 : if (lastVal)
116 0 : return NS_OK;
117 :
118 0 : PRIntervalTime now = PR_IntervalNow();
119 :
120 : // Run the flushers immediately if we can; otherwise, proxy to the
121 : // UI thread an run 'em asynchronously.
122 0 : if (aImmediate) {
123 0 : rv = RunFlushers(aReason);
124 : }
125 : else {
126 : // Don't broadcast more than once every 1000ms to avoid being noisy
127 0 : if (PR_IntervalToMicroseconds(now - sLastFlushTime) > 1000) {
128 0 : sFlushEvent.mReason = aReason;
129 0 : rv = NS_DispatchToMainThread(&sFlushEvent, NS_DISPATCH_NORMAL);
130 : }
131 : }
132 :
133 0 : sLastFlushTime = now;
134 0 : return rv;
135 : }
136 :
137 : nsresult
138 0 : nsMemoryImpl::RunFlushers(const PRUnichar* aReason)
139 : {
140 0 : nsCOMPtr<nsIObserverService> os = mozilla::services::GetObserverService();
141 0 : if (os) {
142 :
143 : // Instead of:
144 : // os->NotifyObservers(this, "memory-pressure", aReason);
145 : // we are going to do this manually to see who/what is
146 : // deallocating.
147 :
148 0 : nsCOMPtr<nsISimpleEnumerator> e;
149 0 : os->EnumerateObservers("memory-pressure", getter_AddRefs(e));
150 :
151 0 : if ( e ) {
152 0 : nsCOMPtr<nsIObserver> observer;
153 0 : bool loop = true;
154 :
155 0 : while (NS_SUCCEEDED(e->HasMoreElements(&loop)) && loop)
156 : {
157 0 : e->GetNext(getter_AddRefs(observer));
158 :
159 0 : if (!observer)
160 0 : continue;
161 :
162 0 : observer->Observe(observer, "memory-pressure", aReason);
163 : }
164 : }
165 : }
166 :
167 0 : sIsFlushing = 0;
168 0 : return NS_OK;
169 : }
170 :
171 : // XXX need NS_IMPL_STATIC_ADDREF/RELEASE
172 0 : NS_IMETHODIMP_(nsrefcnt) nsMemoryImpl::FlushEvent::AddRef() { return 2; }
173 0 : NS_IMETHODIMP_(nsrefcnt) nsMemoryImpl::FlushEvent::Release() { return 1; }
174 0 : NS_IMPL_QUERY_INTERFACE1(nsMemoryImpl::FlushEvent, nsIRunnable)
175 :
176 : NS_IMETHODIMP
177 0 : nsMemoryImpl::FlushEvent::Run()
178 : {
179 0 : sGlobalMemory.RunFlushers(mReason);
180 0 : return NS_OK;
181 : }
182 :
183 : PRInt32
184 : nsMemoryImpl::sIsFlushing = 0;
185 :
186 : PRIntervalTime
187 : nsMemoryImpl::sLastFlushTime = 0;
188 :
189 : nsMemoryImpl::FlushEvent
190 1464 : nsMemoryImpl::sFlushEvent;
191 :
192 : XPCOM_API(void*)
193 9415818 : NS_Alloc(PRSize size)
194 : {
195 9415818 : return moz_xmalloc(size);
196 : }
197 :
198 : XPCOM_API(void*)
199 32538 : NS_Realloc(void* ptr, PRSize size)
200 : {
201 32538 : return moz_xrealloc(ptr, size);
202 : }
203 :
204 : XPCOM_API(void)
205 9853108 : NS_Free(void* ptr)
206 : {
207 9853108 : moz_free(ptr);
208 9853108 : }
209 :
210 : nsresult
211 26450 : NS_GetMemoryManager(nsIMemory* *result)
212 : {
213 26450 : return sGlobalMemory.QueryInterface(NS_GET_IID(nsIMemory), (void**) result);
214 4392 : }
|