Release note: Bug 2809 - [Raptor] Intermediate Resource Filenames not unique, rom fails to boot
/*
* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
* All rights reserved.
* This component and the accompanying materials are made available
* under the terms of the License "Eclipse Public License v1.0"
* which accompanies this distribution, and is available
* at the URL "http://www.eclipse.org/legal/epl-v10.html".
*
* Initial Contributors:
* Nokia Corporation - initial contribution.
*
* Contributors:
*
* Description:
*
*/
#include "sema.h"
// OS specific headers
#ifdef WIN32
#include <windows.h>
#include <tlhelp32.h>
#else
#include <semaphore.h>
#include <sys/types.h>
#include <signal.h>
#include <fcntl.h>
#include <time.h>
#endif
#include <unistd.h>
void sema_create(sbs_semaphore *s)
{
#ifdef WIN32
s->handle = CreateSemaphore(NULL, 1, 1, s->name);
if (s->handle)
CloseHandle(s->handle);
else
error("unable to create semaphore %s", s->name);
#else
s->handle = sem_open(s->name, O_CREAT | O_EXCL, 0644, 1);
if (s->handle == SEM_FAILED)
{
sem_close(s->handle);
error("unable to create semaphore %s", s->name);
}
sem_close(s->handle);
#endif
}
void sema_destroy(sbs_semaphore *s)
{
#ifdef WIN32
/* can't destroy a windows semaphore... */
#else
if (sem_unlink(s->name) != 0)
error("unable to unlink semaphore", s->name);
#endif
}
int sema_wait(sbs_semaphore *s)
{
/* try and open the semaphore now */
#ifdef WIN32
s->handle = CreateSemaphore(NULL, 1, 1, s->name);
if (!s->handle)
{
error("unable to open semaphore %s", s->name);
return -2;
}
#else
struct timespec tmout;
s->handle = sem_open(s->name, 0);
if (s->handle == SEM_FAILED)
{
sem_close(s->handle);
error("unable to open semaphore %s\n", s->name);
return -2;
}
#endif
/* wait for the semaphore to be free [timeout if it takes too long] */
int timedOutFlag = 0;
int semcount = 0;
#ifdef WIN32
timedOutFlag = (WaitForSingleObject(s->handle, s->timeout) != WAIT_OBJECT_0);
#else
sem_getvalue(s->handle, &semcount);
debug("sema: count before wait: %d\n", semcount);
debug("sema: timeout: %d\n", s->timeout);
if (clock_gettime(CLOCK_REALTIME, &tmout) == -1)
{
error("sema: clock_gettime failed - can't do timed wait");
return -1;
}
tmout.tv_sec += (s->timeout / 1000);
tmout.tv_nsec += (s->timeout % 1000) * 1000;
timedOutFlag = sem_timedwait(s->handle, &tmout);
/* roughly speaking the return value indicates timeouts. It also indicated
* signals. We are glossing over this for the moment since it isn't really
* interesting in this application
* */
#endif
return timedOutFlag;
}
void sema_release(sbs_semaphore *s)
{
/* release the semaphore */
#ifdef WIN32
ReleaseSemaphore(s->handle, 1, NULL);
#else
sem_post(s->handle);
#endif
/* clean up */
#ifdef WIN32
CloseHandle(s->handle);
#else
sem_close(s->handle);
#endif
}