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author | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
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committer | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
commit | 5f8de423f190bbb79a62f804151bc24824fa32d8 (patch) | |
tree | 10027f336435511475e392454359edea8e25895d /ipc/chromium/src/base/platform_thread_mac.mm | |
parent | 49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff) | |
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Add m-esr52 at 52.6.0
Diffstat (limited to 'ipc/chromium/src/base/platform_thread_mac.mm')
-rw-r--r-- | ipc/chromium/src/base/platform_thread_mac.mm | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/ipc/chromium/src/base/platform_thread_mac.mm b/ipc/chromium/src/base/platform_thread_mac.mm new file mode 100644 index 000000000..ef558a796 --- /dev/null +++ b/ipc/chromium/src/base/platform_thread_mac.mm @@ -0,0 +1,77 @@ +// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. + +#include "base/platform_thread.h" + +#import <Foundation/Foundation.h> +#include <dlfcn.h> + +#include "base/logging.h" +#include "base/scoped_nsautorelease_pool.h" + +// A simple class that demonstrates our impressive ability to do nothing. +@interface NoOp : NSObject + +// Does the deed. Or does it? ++ (void)noOp; + +@end + +@implementation NoOp + ++ (void)noOp { +} + +@end + +namespace base { + +// If Cocoa is to be used on more than one thread, it must know that the +// application is multithreaded. Since it's possible to enter Cocoa code +// from threads created by pthread_thread_create, Cocoa won't necessarily +// be aware that the application is multithreaded. Spawning an NSThread is +// enough to get Cocoa to set up for multithreaded operation, so this is done +// if necessary before pthread_thread_create spawns any threads. +// +// http://developer.apple.com/documentation/Cocoa/Conceptual/Multithreading/CreatingThreads/chapter_4_section_4.html +void InitThreading() { + // this is called early in startup, before the event loop, so provide + // an autorelease pool to prevent leaks here + ScopedNSAutoreleasePool pool; + + static BOOL multithreaded = [NSThread isMultiThreaded]; + if (!multithreaded) { + [NSThread detachNewThreadSelector:@selector(noOp) + toTarget:[NoOp class] + withObject:nil]; + multithreaded = YES; + + DCHECK([NSThread isMultiThreaded]); + } +} + +} // namespace base + +// static +void PlatformThread::SetName(const char* name) { + // pthread_setname_np is only available in 10.6 or later, so test + // for it at runtime. + int (*dynamic_pthread_setname_np)(const char*); + *reinterpret_cast<void**>(&dynamic_pthread_setname_np) = + dlsym(RTLD_DEFAULT, "pthread_setname_np"); + if (!dynamic_pthread_setname_np) + return; + + // Mac OS X does not expose the length limit of the name, so + // hardcode it. + const int kMaxNameLength = 63; + std::string shortened_name = std::string(name).substr(0, kMaxNameLength); + // pthread_setname() fails (harmlessly) in the sandbox, ignore when it does. + // See http://crbug.com/47058 + + // The name parameter is copied thus it's safe to release it after calling. + // Checked against the bionic implementation in bionic/libc/bionic/pthread.c + dynamic_pthread_setname_np(shortened_name.c_str()); +} + |