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| 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 | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "src/platform/semaphore.h" | |
| 6 | |
| 7 #if V8_OS_MACOSX | |
| 8 #include <mach/mach_init.h> | |
| 9 #include <mach/task.h> | |
| 10 #endif | |
| 11 | |
| 12 #include <errno.h> | |
| 13 | |
| 14 #include "src/checks.h" | |
| 15 #include "src/platform/time.h" | |
| 16 | |
| 17 namespace v8 { | |
| 18 namespace internal { | |
| 19 | |
| 20 #if V8_OS_MACOSX | |
| 21 | |
| 22 Semaphore::Semaphore(int count) { | |
| 23 kern_return_t result = semaphore_create( | |
| 24 mach_task_self(), &native_handle_, SYNC_POLICY_FIFO, count); | |
| 25 ASSERT_EQ(KERN_SUCCESS, result); | |
| 26 USE(result); | |
| 27 } | |
| 28 | |
| 29 | |
| 30 Semaphore::~Semaphore() { | |
| 31 kern_return_t result = semaphore_destroy(mach_task_self(), native_handle_); | |
| 32 ASSERT_EQ(KERN_SUCCESS, result); | |
| 33 USE(result); | |
| 34 } | |
| 35 | |
| 36 | |
| 37 void Semaphore::Signal() { | |
| 38 kern_return_t result = semaphore_signal(native_handle_); | |
| 39 ASSERT_EQ(KERN_SUCCESS, result); | |
| 40 USE(result); | |
| 41 } | |
| 42 | |
| 43 | |
| 44 void Semaphore::Wait() { | |
| 45 while (true) { | |
| 46 kern_return_t result = semaphore_wait(native_handle_); | |
| 47 if (result == KERN_SUCCESS) return; // Semaphore was signalled. | |
| 48 ASSERT_EQ(KERN_ABORTED, result); | |
| 49 } | |
| 50 } | |
| 51 | |
| 52 | |
| 53 bool Semaphore::WaitFor(const TimeDelta& rel_time) { | |
| 54 TimeTicks now = TimeTicks::Now(); | |
| 55 TimeTicks end = now + rel_time; | |
| 56 while (true) { | |
| 57 mach_timespec_t ts; | |
| 58 if (now >= end) { | |
| 59 // Return immediately if semaphore was not signalled. | |
| 60 ts.tv_sec = 0; | |
| 61 ts.tv_nsec = 0; | |
| 62 } else { | |
| 63 ts = (end - now).ToMachTimespec(); | |
| 64 } | |
| 65 kern_return_t result = semaphore_timedwait(native_handle_, ts); | |
| 66 if (result == KERN_SUCCESS) return true; // Semaphore was signalled. | |
| 67 if (result == KERN_OPERATION_TIMED_OUT) return false; // Timeout. | |
| 68 ASSERT_EQ(KERN_ABORTED, result); | |
| 69 now = TimeTicks::Now(); | |
| 70 } | |
| 71 } | |
| 72 | |
| 73 #elif V8_OS_POSIX | |
| 74 | |
| 75 Semaphore::Semaphore(int count) { | |
| 76 ASSERT(count >= 0); | |
| 77 int result = sem_init(&native_handle_, 0, count); | |
| 78 ASSERT_EQ(0, result); | |
| 79 USE(result); | |
| 80 } | |
| 81 | |
| 82 | |
| 83 Semaphore::~Semaphore() { | |
| 84 int result = sem_destroy(&native_handle_); | |
| 85 ASSERT_EQ(0, result); | |
| 86 USE(result); | |
| 87 } | |
| 88 | |
| 89 | |
| 90 void Semaphore::Signal() { | |
| 91 int result = sem_post(&native_handle_); | |
| 92 ASSERT_EQ(0, result); | |
| 93 USE(result); | |
| 94 } | |
| 95 | |
| 96 | |
| 97 void Semaphore::Wait() { | |
| 98 while (true) { | |
| 99 int result = sem_wait(&native_handle_); | |
| 100 if (result == 0) return; // Semaphore was signalled. | |
| 101 // Signal caused spurious wakeup. | |
| 102 ASSERT_EQ(-1, result); | |
| 103 ASSERT_EQ(EINTR, errno); | |
| 104 } | |
| 105 } | |
| 106 | |
| 107 | |
| 108 bool Semaphore::WaitFor(const TimeDelta& rel_time) { | |
| 109 // Compute the time for end of timeout. | |
| 110 const Time time = Time::NowFromSystemTime() + rel_time; | |
| 111 const struct timespec ts = time.ToTimespec(); | |
| 112 | |
| 113 // Wait for semaphore signalled or timeout. | |
| 114 while (true) { | |
| 115 int result = sem_timedwait(&native_handle_, &ts); | |
| 116 if (result == 0) return true; // Semaphore was signalled. | |
| 117 #if V8_LIBC_GLIBC && !V8_GLIBC_PREREQ(2, 4) | |
| 118 if (result > 0) { | |
| 119 // sem_timedwait in glibc prior to 2.3.4 returns the errno instead of -1. | |
| 120 errno = result; | |
| 121 result = -1; | |
| 122 } | |
| 123 #endif | |
| 124 if (result == -1 && errno == ETIMEDOUT) { | |
| 125 // Timed out while waiting for semaphore. | |
| 126 return false; | |
| 127 } | |
| 128 // Signal caused spurious wakeup. | |
| 129 ASSERT_EQ(-1, result); | |
| 130 ASSERT_EQ(EINTR, errno); | |
| 131 } | |
| 132 } | |
| 133 | |
| 134 #elif V8_OS_WIN | |
| 135 | |
| 136 Semaphore::Semaphore(int count) { | |
| 137 ASSERT(count >= 0); | |
| 138 native_handle_ = ::CreateSemaphoreA(NULL, count, 0x7fffffff, NULL); | |
| 139 ASSERT(native_handle_ != NULL); | |
| 140 } | |
| 141 | |
| 142 | |
| 143 Semaphore::~Semaphore() { | |
| 144 BOOL result = CloseHandle(native_handle_); | |
| 145 ASSERT(result); | |
| 146 USE(result); | |
| 147 } | |
| 148 | |
| 149 | |
| 150 void Semaphore::Signal() { | |
| 151 LONG dummy; | |
| 152 BOOL result = ReleaseSemaphore(native_handle_, 1, &dummy); | |
| 153 ASSERT(result); | |
| 154 USE(result); | |
| 155 } | |
| 156 | |
| 157 | |
| 158 void Semaphore::Wait() { | |
| 159 DWORD result = WaitForSingleObject(native_handle_, INFINITE); | |
| 160 ASSERT(result == WAIT_OBJECT_0); | |
| 161 USE(result); | |
| 162 } | |
| 163 | |
| 164 | |
| 165 bool Semaphore::WaitFor(const TimeDelta& rel_time) { | |
| 166 TimeTicks now = TimeTicks::Now(); | |
| 167 TimeTicks end = now + rel_time; | |
| 168 while (true) { | |
| 169 int64_t msec = (end - now).InMilliseconds(); | |
| 170 if (msec >= static_cast<int64_t>(INFINITE)) { | |
| 171 DWORD result = WaitForSingleObject(native_handle_, INFINITE - 1); | |
| 172 if (result == WAIT_OBJECT_0) { | |
| 173 return true; | |
| 174 } | |
| 175 ASSERT(result == WAIT_TIMEOUT); | |
| 176 now = TimeTicks::Now(); | |
| 177 } else { | |
| 178 DWORD result = WaitForSingleObject( | |
| 179 native_handle_, (msec < 0) ? 0 : static_cast<DWORD>(msec)); | |
| 180 if (result == WAIT_TIMEOUT) { | |
| 181 return false; | |
| 182 } | |
| 183 ASSERT(result == WAIT_OBJECT_0); | |
| 184 return true; | |
| 185 } | |
| 186 } | |
| 187 } | |
| 188 | |
| 189 #endif // V8_OS_MACOSX | |
| 190 | |
| 191 } } // namespace v8::internal | |
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Chromium Code Reviews
Issue 358363002:
Move platform abstraction to base library (Closed)
Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge