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comparison: ipc/chromium/src/base/platform_thread_mac.mm
ipc/chromium/src/base/platform_thread_mac.mm
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:299cfce524f3 |
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| 1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "base/platform_thread.h" | |
| 6 | |
| 7 #import <Foundation/Foundation.h> | |
| 8 #include <dlfcn.h> | |
| 9 | |
| 10 #include "base/logging.h" | |
| 11 #include "base/scoped_nsautorelease_pool.h" | |
| 12 | |
| 13 // A simple class that demonstrates our impressive ability to do nothing. | |
| 14 @interface NoOp : NSObject | |
| 15 | |
| 16 // Does the deed. Or does it? | |
| 17 + (void)noOp; | |
| 18 | |
| 19 @end | |
| 20 | |
| 21 @implementation NoOp | |
| 22 | |
| 23 + (void)noOp { | |
| 24 } | |
| 25 | |
| 26 @end | |
| 27 | |
| 28 namespace base { | |
| 29 | |
| 30 // If Cocoa is to be used on more than one thread, it must know that the | |
| 31 // application is multithreaded. Since it's possible to enter Cocoa code | |
| 32 // from threads created by pthread_thread_create, Cocoa won't necessarily | |
| 33 // be aware that the application is multithreaded. Spawning an NSThread is | |
| 34 // enough to get Cocoa to set up for multithreaded operation, so this is done | |
| 35 // if necessary before pthread_thread_create spawns any threads. | |
| 36 // | |
| 37 // http://developer.apple.com/documentation/Cocoa/Conceptual/Multithreading/CreatingThreads/chapter_4_section_4.html | |
| 38 void InitThreading() { | |
| 39 // this is called early in startup, before the event loop, so provide | |
| 40 // an autorelease pool to prevent leaks here | |
| 41 ScopedNSAutoreleasePool pool; | |
| 42 | |
| 43 static BOOL multithreaded = [NSThread isMultiThreaded]; | |
| 44 if (!multithreaded) { | |
| 45 [NSThread detachNewThreadSelector:@selector(noOp) | |
| 46 toTarget:[NoOp class] | |
| 47 withObject:nil]; | |
| 48 multithreaded = YES; | |
| 49 | |
| 50 DCHECK([NSThread isMultiThreaded]); | |
| 51 } | |
| 52 } | |
| 53 | |
| 54 } // namespace base | |
| 55 | |
| 56 // static | |
| 57 void PlatformThread::SetName(const char* name) { | |
| 58 // pthread_setname_np is only available in 10.6 or later, so test | |
| 59 // for it at runtime. | |
| 60 int (*dynamic_pthread_setname_np)(const char*); | |
| 61 *reinterpret_cast<void**>(&dynamic_pthread_setname_np) = | |
| 62 dlsym(RTLD_DEFAULT, "pthread_setname_np"); | |
| 63 if (!dynamic_pthread_setname_np) | |
| 64 return; | |
| 65 | |
| 66 // Mac OS X does not expose the length limit of the name, so | |
| 67 // hardcode it. | |
| 68 const int kMaxNameLength = 63; | |
| 69 std::string shortened_name = std::string(name).substr(0, kMaxNameLength); | |
| 70 // pthread_setname() fails (harmlessly) in the sandbox, ignore when it does. | |
| 71 // See http://crbug.com/47058 | |
| 72 | |
| 73 // The name parameter is copied thus it's safe to release it after calling. | |
| 74 // Checked against the bionic implementation in bionic/libc/bionic/pthread.c | |
| 75 dynamic_pthread_setname_np(shortened_name.c_str()); | |
| 76 } | |
| 77 |
