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1 // Copyright 2013 the V8 project authors. All rights reserved. | 1 // Copyright 2013 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "src/base/platform/semaphore.h" | 5 #include "src/base/platform/semaphore.h" |
6 | 6 |
7 #if V8_OS_MACOSX | 7 #if V8_OS_MACOSX |
8 #include <mach/mach_init.h> | 8 #include <mach/mach_init.h> |
9 #include <mach/task.h> | 9 #include <mach/task.h> |
10 #endif | 10 #endif |
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71 } | 71 } |
72 } | 72 } |
73 | 73 |
74 #elif V8_OS_POSIX | 74 #elif V8_OS_POSIX |
75 | 75 |
76 Semaphore::Semaphore(int count) { | 76 Semaphore::Semaphore(int count) { |
77 // The sem_init() does not check for alignment of the native handle. | 77 // The sem_init() does not check for alignment of the native handle. |
78 // Unaligned native handle can later cause a failure in semaphore signal. | 78 // Unaligned native handle can later cause a failure in semaphore signal. |
79 // Check the alignment here to catch the failure earlier. | 79 // Check the alignment here to catch the failure earlier. |
80 // Context: crbug.com/605349. | 80 // Context: crbug.com/605349. |
81 #if V8_OS_AIX | |
82 // On aix sem_t is of type int | |
83 const uintptr_t kPointerAlignmentMask = sizeof(int) - 1; | |
jochen (gone - plz use gerrit)
2016/05/03 11:03:09
please keep to rename of kPointerAlignmentMask to
| |
84 #else | |
81 const uintptr_t kPointerAlignmentMask = sizeof(void*) - 1; | 85 const uintptr_t kPointerAlignmentMask = sizeof(void*) - 1; |
86 #endif | |
82 CHECK_EQ( | 87 CHECK_EQ( |
83 0, reinterpret_cast<uintptr_t>(&native_handle_) & kPointerAlignmentMask); | 88 0, reinterpret_cast<uintptr_t>(&native_handle_) & kPointerAlignmentMask); |
84 DCHECK(count >= 0); | 89 DCHECK(count >= 0); |
85 #if V8_LIBC_GLIBC | 90 #if V8_LIBC_GLIBC |
86 // sem_init in glibc prior to 2.1 does not zero out semaphores. | 91 // sem_init in glibc prior to 2.1 does not zero out semaphores. |
87 memset(&native_handle_, 0, sizeof(native_handle_)); | 92 memset(&native_handle_, 0, sizeof(native_handle_)); |
88 #endif | 93 #endif |
89 int result = sem_init(&native_handle_, 0, count); | 94 int result = sem_init(&native_handle_, 0, count); |
90 DCHECK_EQ(0, result); | 95 DCHECK_EQ(0, result); |
91 USE(result); | 96 USE(result); |
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208 DCHECK(result == WAIT_OBJECT_0); | 213 DCHECK(result == WAIT_OBJECT_0); |
209 return true; | 214 return true; |
210 } | 215 } |
211 } | 216 } |
212 } | 217 } |
213 | 218 |
214 #endif // V8_OS_MACOSX | 219 #endif // V8_OS_MACOSX |
215 | 220 |
216 } // namespace base | 221 } // namespace base |
217 } // namespace v8 | 222 } // namespace v8 |
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