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Full Discussion: Semaphore Segmentation Fault
Top Forums Programming Semaphore Segmentation Fault Post 302091065 by blowtorch on Thursday 28th of September 2006 10:10:01 PM
Old 09-28-2006
Is your sem_open call returning a valid semaphore value? Are you checking for that? For all you know the sem_open is returning SEM_FAILED.
 

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semaphore.h(3HEAD)                                                    Headers                                                   semaphore.h(3HEAD)

NAME
semaphore.h, semaphore - semaphores SYNOPSIS
#include <semaphore.h> DESCRIPTION
The <semaphore.h> header defines the sem_t type, used in performing semaphore operations. The semaphore can be implemented using a file descriptor, in which case applications are able to open up at least a total of {OPEN_MAX} files and semaphores. The symbol SEM_FAILED is defined (see sem_open(3RT)). Inclusion of the <semaphore.h> header can make visible symbols defined in the headers <fcntl.h> and <sys/types.h>. See fcntl.h(3HEAD) and types.h(3HEAD). ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ SEE ALSO
fcntl.h(3HEAD), types.h(3HEAD), sem_destroy(3RT), sem_getvalue(3RT), sem_init(3RT), sem_open(3RT), sem_post(3RT), sem_timedwait(3RT), sem_unlink(3RT), sem_wait(3RT), attributes(5), standards(5) SunOS 5.10 10 Sep 2004 semaphore.h(3HEAD)
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