sems-win.cpp revision 7c3df511b65c587226c53ce0d72c3644bc803ef9
/* $Id$ */
/** @file
* innotek Portable Runtime - Semaphores, implementation for Windows host platform.
*/
/*
* Copyright (C) 2006-2007 innotek GmbH
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License as published by the Free Software Foundation,
* in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
* distribution. VirtualBox OSE is distributed in the hope that it will
* be useful, but WITHOUT ANY WARRANTY of any kind.
*/
/*******************************************************************************
* Header Files *
*******************************************************************************/
#define LOG_GROUP RTLOGGROUP_SEMAPHORE
#include <Windows.h>
#include <iprt/semaphore.h>
#include <iprt/assert.h>
#include <iprt/err.h>
/** Converts semaphore to win32 handle. */
#define SEM2HND(Sem) ((HANDLE)(uintptr_t)Sem)
RTDECL(int) RTSemEventCreate(PRTSEMEVENT pEventSem)
{
/*
* Create the semaphore.
* (Auto reset, not signaled, private event object.)
*/
HANDLE hev = CreateEvent(NULL, FALSE, FALSE, NULL);
if (hev)
{
*pEventSem = (RTSEMEVENT)(void *)hev;
return VINF_SUCCESS;
}
return RTErrConvertFromWin32(GetLastError());
}
RTDECL(int) RTSemEventDestroy(RTSEMEVENT EventSem)
{
/*
* Close semaphore handle.
*/
if (CloseHandle(SEM2HND(EventSem)))
return VINF_SUCCESS;
AssertMsgFailed(("Destroy EventSem %p failed, lasterr=%d\n", EventSem, GetLastError()));
return RTErrConvertFromWin32(GetLastError());
}
RTDECL(int) RTSemEventWaitNoResume(RTSEMEVENT EventSem, unsigned cMillies)
{
/*
* Wait for condition.
*/
int rc = WaitForSingleObjectEx(SEM2HND(EventSem), cMillies == RT_INDEFINITE_WAIT ? INFINITE : cMillies, TRUE);
switch (rc)
{
case WAIT_OBJECT_0: return VINF_SUCCESS;
case WAIT_TIMEOUT: return VERR_TIMEOUT;
case WAIT_IO_COMPLETION: return VERR_INTERRUPTED;
case WAIT_ABANDONED: return VERR_SEM_OWNER_DIED;
default:
{
AssertMsgFailed(("Wait on EventSem %p failed, rc=%d lasterr=%d\n", EventSem, rc, GetLastError()));
int rc2 = RTErrConvertFromWin32(GetLastError());
if (rc2)
return rc2;
AssertMsgFailed(("WaitForSingleObject(event) -> rc=%d while converted lasterr=%d\n", rc, rc2));
return VERR_INTERNAL_ERROR;
}
}
}
RTDECL(int) RTSemEventSignal(RTSEMEVENT EventSem)
{
/*
* Signal the object.
*/
if (SetEvent(SEM2HND(EventSem)))
return VINF_SUCCESS;
AssertMsgFailed(("Signaling EventSem %p failed, lasterr=%d\n", EventSem, GetLastError()));
return RTErrConvertFromWin32(GetLastError());
}
RTDECL(int) RTSemEventMultiCreate(PRTSEMEVENTMULTI pEventMultiSem)
{
/*
* Create the semaphore.
* (Manual reset, not signaled, private event object.)
*/
HANDLE hev = CreateEvent(NULL, TRUE, FALSE, NULL);
if (hev)
{
*pEventMultiSem = (RTSEMEVENTMULTI)(void *)hev;
return VINF_SUCCESS;
}
return RTErrConvertFromWin32(GetLastError());
}
RTDECL(int) RTSemEventMultiDestroy(RTSEMEVENTMULTI EventMultiSem)
{
/*
* Close semaphore handle.
*/
if (CloseHandle(SEM2HND(EventMultiSem)))
return VINF_SUCCESS;
AssertMsgFailed(("Destroy EventMultiSem %p failed, lasterr=%d\n", EventMultiSem, GetLastError()));
return RTErrConvertFromWin32(GetLastError());
}
RTDECL(int) RTSemEventMultiSignal(RTSEMEVENTMULTI EventMultiSem)
{
/*
* Signal the object.
*/
if (SetEvent(SEM2HND(EventMultiSem)))
return VINF_SUCCESS;
AssertMsgFailed(("Signaling EventMultiSem %p failed, lasterr=%d\n", EventMultiSem, GetLastError()));
return RTErrConvertFromWin32(GetLastError());
}
RTDECL(int) RTSemEventMultiReset(RTSEMEVENTMULTI EventMultiSem)
{
/*
* Reset the object.
*/
if (ResetEvent(SEM2HND(EventMultiSem)))
return VINF_SUCCESS;
AssertMsgFailed(("Resetting EventMultiSem %p failed, lasterr=%d\n", EventMultiSem, GetLastError()));
return RTErrConvertFromWin32(GetLastError());
}
RTDECL(int) RTSemEventMultiWaitNoResume(RTSEMEVENTMULTI EventMultiSem, unsigned cMillies)
{
/*
* Wait for condition.
*/
int rc = WaitForSingleObjectEx(SEM2HND(EventMultiSem), cMillies == RT_INDEFINITE_WAIT ? INFINITE : cMillies, TRUE);
switch (rc)
{
case WAIT_OBJECT_0: return VINF_SUCCESS;
case WAIT_TIMEOUT: return VERR_TIMEOUT;
case WAIT_IO_COMPLETION: return VERR_INTERRUPTED;
case WAIT_ABANDONED: return VERR_SEM_OWNER_DIED;
default:
{
AssertMsgFailed(("Wait on EventMultiSem %p failed, rc=%d lasterr=%d\n", EventMultiSem, rc, GetLastError()));
int rc2 = RTErrConvertFromWin32(GetLastError());
if (rc2)
return rc2;
AssertMsgFailed(("WaitForSingleObject(event) -> rc=%d while converted lasterr=%d\n", rc, rc2));
return VERR_INTERNAL_ERROR;
}
}
}
RTDECL(int) RTSemMutexCreate(PRTSEMMUTEX pMutexSem)
{
/*
* Create the semaphore.
*/
HANDLE hmtx = CreateMutex(NULL, FALSE, NULL);
if (hmtx)
{
*pMutexSem = (RTSEMMUTEX)(void *)hmtx;
return VINF_SUCCESS;
}
return RTErrConvertFromWin32(GetLastError());
}
RTDECL(int) RTSemMutexDestroy(RTSEMMUTEX MutexSem)
{
/*
* Close semaphore handle.
*/
if (CloseHandle(SEM2HND(MutexSem)))
return VINF_SUCCESS;
AssertMsgFailed(("Destroy MutexSem %p failed, lasterr=%d\n", MutexSem, GetLastError()));
return RTErrConvertFromWin32(GetLastError());
}
RTDECL(int) RTSemMutexRequestNoResume(RTSEMMUTEX MutexSem, unsigned cMillies)
{
/*
* Lock mutex semaphore.
*/
int rc = WaitForSingleObjectEx(SEM2HND(MutexSem), cMillies == RT_INDEFINITE_WAIT ? INFINITE : cMillies, TRUE);
switch (rc)
{
case WAIT_OBJECT_0: return VINF_SUCCESS;
case WAIT_TIMEOUT: return VERR_TIMEOUT;
case WAIT_IO_COMPLETION: return VERR_INTERRUPTED;
case WAIT_ABANDONED: return VERR_SEM_OWNER_DIED;
default:
{
AssertMsgFailed(("Wait on MutexSem %p failed, rc=%d lasterr=%d\n", MutexSem, rc, GetLastError()));
int rc2 = RTErrConvertFromWin32(GetLastError());
if (rc2 != 0)
return rc2;
AssertMsgFailed(("WaitForSingleObject(event) -> rc=%d while converted lasterr=%d\n", rc, rc2));
return VERR_INTERNAL_ERROR;
}
}
}
RTDECL(int) RTSemMutexRelease(RTSEMMUTEX MutexSem)
{
/*
* Unlock mutex semaphore.
*/
if (ReleaseMutex(SEM2HND(MutexSem)))
return VINF_SUCCESS;
AssertMsgFailed(("Release MutexSem %p failed, lasterr=%d\n", MutexSem, GetLastError()));
return RTErrConvertFromWin32(GetLastError());
}