pthread_rwlockattr_getpshared(3)
NAME
pthread_rwlockattr_getpshared -- get the process shared attribute
LIBRARY
Reentrant C Library (libc_r, -lc_r) POSIX Threads Library (libpthread, -lpthread) 1:1 Threading Library (libthr, -lthr)
SYNOPSIS
#include <pthread.h> int pthread_rwlockattr_getpshared(const pthread_rwlockattr_t *attr, int *pshared);
DESCRIPTION
The pthread_rwlockattr_getpshared() function is used to get the process shared setting of a read/write lock attribute object. The setting is returned via pshared, and may be one of two values: PTHREAD_PROCESS_SHARED Any thread of any process that has access to the memory where the read/write lock resides can manipulate the lock. PTHREAD_PROCESS_PRIVATE Only threads created within the same process as the thread that initialized the read/write lock can manipulate the lock. This is the default value.
RETURN VALUES
If successful, the pthread_rwlockattr_getpshared() function will return zero. Otherwise an error number will be returned to indicate the error.
SEE ALSO
pthread_rwlockattr_init(3), pthread_rwlockattr_setpshared(3), pthread_rwlock_init(3)
STANDARDS
The pthread_rwlockattr_getpshared() function is expected to conform to Version 2 of the Single UNIX Specification (``SUSv2'').
ERRORS
The pthread_rwlockattr_getpshared() function may fail if: [EINVAL] The value specified by attr is invalid.
HISTORY
The pthread_rwlockattr_getpshared() function first appeared in FreeBSD 3.0. FreeBSD 5.4 March 22, 1999 FreeBSD 5.4
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