1 2 /* 3 * Copyright 2008 The Android Open Source Project 4 * 5 * Use of this source code is governed by a BSD-style license that can be 6 * found in the LICENSE file. 7 */ 8 9 10 #include <windows.h> 11 #include <intrin.h> 12 #include "SkThread.h" 13 14 //MSDN says in order to declare an interlocked function for use as an 15 //intrinsic, include intrin.h and put the function in a #pragma intrinsic 16 //directive. 17 //The pragma appears to be unnecessary, but doesn't hurt. 18 #pragma intrinsic(_InterlockedIncrement, _InterlockedDecrement) 19 20 int32_t sk_atomic_inc(int32_t* addr) { 21 // InterlockedIncrement returns the new value, we want to return the old. 22 return _InterlockedIncrement(reinterpret_cast<LONG*>(addr)) - 1; 23 } 24 25 int32_t sk_atomic_dec(int32_t* addr) { 26 return _InterlockedDecrement(reinterpret_cast<LONG*>(addr)) + 1; 27 } 28 29 SkMutex::SkMutex() { 30 SK_COMPILE_ASSERT(sizeof(fStorage) > sizeof(CRITICAL_SECTION), 31 NotEnoughSizeForCriticalSection); 32 InitializeCriticalSection(reinterpret_cast<CRITICAL_SECTION*>(&fStorage)); 33 } 34 35 SkMutex::~SkMutex() { 36 DeleteCriticalSection(reinterpret_cast<CRITICAL_SECTION*>(&fStorage)); 37 } 38 39 void SkMutex::acquire() { 40 EnterCriticalSection(reinterpret_cast<CRITICAL_SECTION*>(&fStorage)); 41 } 42 43 void SkMutex::release() { 44 LeaveCriticalSection(reinterpret_cast<CRITICAL_SECTION*>(&fStorage)); 45 } 46 47
