Systémové programování Windows
Synchronizace vláken
Obsah
 Uživatelský režim
 Interlocked…
 CriticalSection
 Objekty jádra
 Event
 Mutex
 Semaphore
Špatně
//
//TAKTO NIKDY NE
//
void Lock( void )
{
//cekani na zamek
while (_locked)
{
Sleep(100);
}
//uzamceni
_locked = true;
}
Interlocked…
LONG __cdecl InterlockedIncrement(
_Inout_ LONG volatile *Addend );
LONG __cdecl InterlockedDecrement(
_Inout_ LONG volatile *Addend );
LONG __cdecl InterlockedCompareExchange(
_Inout_ LONG volatile *Destination,
_In_ LONG Exchange,
_In_ LONG Comparand );
CriticalSection
VOID InitializeCriticalSection(PCRITICAL_SECTION cs);
VOID DeleteCriticalSection(PCRITICAL_SECTION cs);
VOID EnterCriticalSection(PCRITICAL_SECTION cs);
VOID LeaveCriticalSection(PCRITICAL_SECTION cs);
WaitForSingleObject
DWORD WaitForSingleObject(
HANDLE objectHandle,
DWORD milliseconds );
Návratové hodnoty:
 WAIT_OBJECT_0
 WAIT_TIMEOUT
 WAIT_FAILED
Event
HANDLE CreateEvent(
PSECURITY_ATTRIBUTES sa,
BOOL manualReset,
BOOL initialState, //true = signaled
PCTSTR name );
BOOL SetEvent(HANDLE eventHandle);
BOOL ResetEvent(HANDLE eventHandle);
Mutex
HANDLE CreateMutex(
PSECURITY_ATTRIBUTES sa,
BOOL initialOwner,
PCTSTR name );
BOOL ReleaseMutex(HANDLE mutexHandle);
Semaphore
HANDLE CreateSemaphore(
PSECURITY_ATTRIBUTE sa,
LONG initialCount,
LONG maximumCount,
PCTSTR name );
BOOL ReleaseSemaphore(
HANDLE semaphoreHandle,
LONG releaseCount,
PLONG previousCount );
Díky za pozornost