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/*
* Program to print default POSIX condition variable attributes
*/
/*
* Copyright 2018 Joel Sherrill (joel@rtems.org)
*
* This file's license is 2-clause BSD as in this distribution's LICENSE.2 file.
*/
#include <stdlib.h>
#include <stdio.h>
#include <inttypes.h>
#include <pthread.h>
#include <assert.h>
static void print_shared(pthread_condattr_t *attr)
{
int rc;
int shared;
char *s;
rc = pthread_condattr_getpshared( attr, &shared );
assert( rc == 0 );
switch ( shared ) {
case PTHREAD_PROCESS_PRIVATE: s = "PTHREAD_PROCESS_PRIVATE"; break;
case PTHREAD_PROCESS_SHARED: s = "PTHREAD_PROCESS_SHARED"; break;
default: s = "UNKNOWN"; break;
}
printf( "Process shared: %s\n", s );
}
static void print_clock(pthread_condattr_t *attr)
{
int rc;
clockid_t clock;
char *s;
rc = pthread_condattr_getclock( attr, &clock );
assert( rc == 0 );
switch ( clock ) {
case CLOCK_MONOTONIC: s = "CLOCK_MONOTONIC"; break;
case CLOCK_PROCESS_CPUTIME_ID: s = "CLOCK_PROCESS_CPUTIME_ID"; break;
case CLOCK_REALTIME: s = "CLOCK_REALTIME"; break;
case CLOCK_THREAD_CPUTIME_ID: s = "CLOCK_THREAD_CPUTIME_ID"; break;
default: s = "UNKNOWN"; break;
}
printf( "Clock: %s\n", s );
}
int main()
{
pthread_condattr_t attr;
int rc;
puts( "*** POSIX Condition Variable Default Attributes Report ***" );
rc = pthread_condattr_init( &attr );
assert( rc == 0 );
print_shared( &attr );
print_clock( &attr );
puts( "*** END OF POSIX Condition Variable Default Attributes Report ***" );
exit( 0 );
}
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