pthread_condattr_setpshared(3P)pthread_condattr_setpshared(3P)NAME
pthread_condattr_setpshared, pthread_condattr_getpshared - set and get
condition variable process-shared attribute
C SYNOPSIS
#include <pthread.h>
int pthread_condattr_setpshared(pthread_condattr_t *attr,
int pshared);
int pthread_condattr_getpshared(const pthread_condattr_t *attr,
int *pshared);
DESCRIPTION
The pthread_condattr_getpshared() function obtains the value of the
process-shared attribute from the attributes object referenced by attr.
The pthread_condattr_setpshared() function is used to set the process-
shared attribute in an initialized attributes object referenced by attr.
The process-shared attribute is set to PTHREAD_PROCESS_SHARED to permit a
condition variable to be operated upon by any thread that has access to
the memory where the condition variable is allocated, even if the
condition variable is allocated in memory that is shared by multiple
processes. If the process-shared attribute is PTHREAD_PROCESS_PRIVATE,
the condition variable will only be operated upon by threads created
within the same process as the thread that initialized the condition
variable; if threads of differing processes attempt to operate on such a
condition variable, the behavior is undefined. The default value of the
attribute is PTHREAD_PROCESS_PRIVATE.
DIAGNOSTICS
If successful, the pthread_condattr_setpshared() function returns zero.
Otherwise, an error number is returned to indicate the error.
If successful, the pthread_condattr_getpshared() function returns zero
and stores the value of the process-shared attribute of attr into the
object referenced by the pshared parameter. Otherwise, an error number
is returned to indicate the error.
[EINVAL] The new value specified for the attribute is outside the
range of legal values for that attribute.
These functions will not return an error code of [EINTR].
SEE ALSOpthread_condattr_init(3P), pthread_create(3P), pthread_mutex_init(3P),
pthread_cond_init(3P).
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