103 lines
1.4 KiB
C++
103 lines
1.4 KiB
C++
/*
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* \brief POSIX semaphore implementation
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* \author Christian Prochaska
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* \date 2012-03-12
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*
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*/
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/*
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* Copyright (C) 2012-2013 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU General Public License version 2.
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*/
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#include <base/env.h>
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#include <base/printf.h>
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#include <semaphore.h>
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using namespace Genode;
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extern "C" {
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/*
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* This class is named 'struct sem' because the 'sem_t' type is
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* defined as 'struct sem*' in 'semaphore.h'
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*/
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struct sem : Semaphore
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{
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sem(int value) : Semaphore(value) { }
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};
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int sem_close(sem_t *)
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{
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PDBG("not implemented");
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return -1;
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}
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int sem_destroy(sem_t *sem)
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{
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destroy(env()->heap(), *sem);
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return 0;
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}
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int sem_getvalue(sem_t * __restrict sem, int * __restrict sval)
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{
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*sval = (*sem)->cnt();
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return 0;
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}
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int sem_init(sem_t *sem, int pshared, unsigned int value)
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{
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*sem = new (env()->heap()) struct sem(value);
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return 0;
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}
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sem_t *sem_open(const char *, int, ...)
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{
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PDBG("not implemented");
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return 0;
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}
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int sem_post(sem_t *sem)
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{
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(*sem)->up();
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return 0;
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}
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int sem_timedwait(sem_t * __restrict, const struct timespec * __restrict)
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{
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PDBG("not implemented");
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return -1;
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}
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int sem_trywait(sem_t *)
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{
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PDBG("not implemented");
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return -1;
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}
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int sem_unlink(const char *)
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{
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PDBG("not implemented");
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return -1;
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}
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int sem_wait(sem_t *sem)
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{
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(*sem)->down();
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return 0;
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}
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}
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