mirror of https://github.com/diegocr/libnix.git
45 lines
900 B
C
45 lines
900 B
C
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/**
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* POSIX Semaphores Emulation for AmigaOS
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* Copyright (C)2009 Diego Casorran
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*
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* Public Domain as long this copyright notice is left unchanged.
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*
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* Implementation conforms to POSIX.1-2008 where possible.
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*/
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#include "psem.h"
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#include <string.h> /* memset */
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int sem_post (sem_t *__sem)
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{
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psem_t *sem = sem2psem(__sem);
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ENTER();
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POINTER(sem);
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if(_PSEM_INVALID(sem))
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{
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DBG("Invalid sem_t provided, magic=%lx\n",((psem_t *)__sem)->magic);
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errno = EINVAL;
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return -1;
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}
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Forbid();
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if((_SSEM(sem)->ss_QueueCount != -1)
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&& ((_SSEM(sem)->ss_Owner == NULL) || (_SSEM(sem)->ss_Owner == FindTask(NULL))))
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{
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ReleaseSemaphore(_SSEM(sem));
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}
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if((sem->flags & SEMF_EXPUNGE) && (_SSEM(sem)->ss_QueueCount == -1))
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{
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DBG("Delayed expunge will take action now...\n");
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psem_destroy(sem);
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memset(__sem,_PSEM_ERASEDBIT,sizeof(*__sem));
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}
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Permit();
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LEAVE();
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return 0;
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}
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