Commit | Line | Data |
---|---|---|
72b9787e JB |
1 | /***************************************************************************** |
2 | * Copyright (C) 2013 x265 project | |
3 | * | |
4 | * Authors: Steve Borho <steve@borho.org> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111, USA. | |
19 | * | |
20 | * This program is also available under a commercial proprietary license. | |
21 | * For more information, contact us at license @ x265.com | |
22 | *****************************************************************************/ | |
23 | ||
24 | #ifndef X265_WINXP_H | |
25 | #define X265_WINXP_H | |
26 | ||
27 | #if defined(_WIN32) && (_WIN32_WINNT < 0x0600) // _WIN32_WINNT_VISTA | |
28 | ||
29 | #ifdef _MSC_VER | |
30 | #include <intrin.h> // _InterlockedCompareExchange64 | |
31 | #endif | |
32 | ||
33 | namespace x265 { | |
34 | /* non-native condition variable */ | |
35 | typedef struct | |
36 | { | |
37 | CRITICAL_SECTION broadcastMutex; | |
38 | CRITICAL_SECTION waiterCountMutex; | |
39 | HANDLE semaphore; | |
40 | HANDLE waitersDone; | |
41 | volatile int waiterCount; | |
42 | volatile int bIsBroadcast; | |
43 | } ConditionVariable; | |
44 | ||
45 | int WINAPI cond_init(ConditionVariable *cond); | |
46 | void WINAPI cond_broadcast(ConditionVariable *cond); | |
47 | void WINAPI cond_signal(ConditionVariable *cond); | |
48 | BOOL WINAPI cond_wait(ConditionVariable *cond, CRITICAL_SECTION *mutex, DWORD wait); | |
49 | void cond_destroy(ConditionVariable *cond); | |
50 | ||
51 | /* map missing API symbols to our structure and functions */ | |
52 | #define CONDITION_VARIABLE x265::ConditionVariable | |
53 | #define InitializeConditionVariable x265::cond_init | |
54 | #define SleepConditionVariableCS x265::cond_wait | |
55 | #define WakeConditionVariable x265::cond_signal | |
56 | #define WakeAllConditionVariable x265::cond_broadcast | |
57 | #define XP_CONDITION_VAR_FREE x265::cond_destroy | |
58 | ||
59 | #if defined(_MSC_VER) | |
60 | ||
61 | /* Windows XP did not define atomic OR 64, but gcc has a good version, so | |
62 | * only use this workaround when targeting XP with MSVC */ | |
63 | FORCEINLINE LONGLONG interlocked_OR64(__inout LONGLONG volatile *Destination, | |
64 | __in LONGLONG Value) | |
65 | { | |
66 | LONGLONG Old; | |
67 | ||
68 | do | |
69 | { | |
70 | Old = *Destination; | |
71 | } | |
72 | while (_InterlockedCompareExchange64(Destination, Old | Value, Old) != Old); | |
73 | ||
74 | return Old; | |
75 | } | |
76 | ||
77 | #define ATOMIC_OR(ptr, mask) x265::interlocked_OR64((volatile LONG64*)ptr, mask) | |
78 | ||
79 | #if defined(_MSC_VER) && !defined(__INTEL_COMPILER) | |
80 | #pragma intrinsic(_InterlockedCompareExchange64) | |
81 | #endif | |
82 | #endif // defined(_MSC_VER) | |
83 | } // namespace x265 | |
84 | ||
85 | #else // if defined(_WIN32) && (_WIN32_WINNT < 0x0600) | |
86 | ||
87 | #define XP_CONDITION_VAR_FREE(x) | |
88 | ||
89 | #endif // _WIN32_WINNT <= _WIN32_WINNT_WINXP | |
90 | ||
91 | #endif // ifndef X265_WINXP_H |