28 #if defined(__MINGW32__)
30 typedef struct _RTL_SRWLOCK {
32 } RTL_SRWLOCK, *PRTL_SRWLOCK;
35 typedef RTL_SRWLOCK SRWLOCK, *PSRWLOCK;
38 static VOID (WINAPI *fpInitializeSRWLock)(PSRWLOCK lock) = NULL;
39 static VOID (WINAPI *fpAcquireSRWLockExclusive)(PSRWLOCK lock) = NULL;
40 static VOID (WINAPI *fpAcquireSRWLockShared)(PSRWLOCK lock) = NULL;
41 static VOID (WINAPI *fpReleaseSRWLockExclusive)(PSRWLOCK lock) = NULL;
42 static VOID (WINAPI *fpReleaseSRWLockShared)(PSRWLOCK lock) = NULL;
44 static bool sHasSRW =
false;
46 static bool loadSRW() {
47 static bool sChecked =
false;
51 if (HMODULE hLib = ::GetModuleHandleW(L
"Kernel32.dll")) {
53 (VOID (WINAPI *)(PSRWLOCK))::GetProcAddress(hLib,
55 fpAcquireSRWLockExclusive =
56 (VOID (WINAPI *)(PSRWLOCK))::GetProcAddress(hLib,
57 "AcquireSRWLockExclusive");
58 fpAcquireSRWLockShared =
59 (VOID (WINAPI *)(PSRWLOCK))::GetProcAddress(hLib,
60 "AcquireSRWLockShared");
61 fpReleaseSRWLockExclusive =
62 (VOID (WINAPI *)(PSRWLOCK))::GetProcAddress(hLib,
63 "ReleaseSRWLockExclusive");
64 fpReleaseSRWLockShared =
65 (VOID (WINAPI *)(PSRWLOCK))::GetProcAddress(hLib,
66 "ReleaseSRWLockShared");
68 if (fpInitializeSRWLock != NULL) {
78 data_ = calloc(1,
sizeof(SRWLOCK));
79 fpInitializeSRWLock(static_cast<PSRWLOCK>(data_));
81 data_ = calloc(1,
sizeof(CRITICAL_SECTION));
82 InitializeCriticalSection(static_cast<LPCRITICAL_SECTION>(data_));
88 DeleteCriticalSection(static_cast<LPCRITICAL_SECTION>(data_));
95 fpAcquireSRWLockShared(static_cast<PSRWLOCK>(data_));
97 EnterCriticalSection(static_cast<LPCRITICAL_SECTION>(data_));
104 fpReleaseSRWLockShared(static_cast<PSRWLOCK>(data_));
106 LeaveCriticalSection(static_cast<LPCRITICAL_SECTION>(data_));
113 fpAcquireSRWLockExclusive(static_cast<PSRWLOCK>(data_));
115 EnterCriticalSection(static_cast<LPCRITICAL_SECTION>(data_));
122 fpReleaseSRWLockExclusive(static_cast<PSRWLOCK>(data_));
124 LeaveCriticalSection(static_cast<LPCRITICAL_SECTION>(data_));
~RWMutexImpl()
Releases and removes the lock.
bool writer_release()
Attempts to release the lock in writer mode.
bool writer_acquire()
Attempts to unconditionally acquire the lock in reader mode.
bool reader_acquire()
Attempts to unconditionally acquire the lock in reader mode.
RWMutexImpl()
Initializes the lock but doesn't acquire it.
bool reader_release()
Attempts to release the lock in reader mode.