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Initialize the attribute object for creating condition variables
#include <pthread.h>
int pthread_condattr_init( pthread_condattr_t* attr );
- attr
- A pointer to the pthread_condattr_t object that you
want to initialize.
libc
Use the -l c option to
qcc
to link against this library.
This library is usually included automatically.
The pthread_condattr_init() function initializes the
attributes in the condition variable attribute object attr to
default values.
Pass attr to
pthread_cond_init()
to define the attributes of the condition variable.
Condition variables have at least the following attributes defined:
- PTHREAD_PROCESS_PRIVATE
- The condition variable can be accessed only by threads created within
the same process as the thread that initialized the condition variable.
- PTHREAD_PROCESS_SHARED
- Any thread that has access to the memory where the condition variable
is allocated can access the condition variable.
For more information about these attributes, see
pthread_condattr_getpshared()
and
pthread_condattr_setpshared().
- EOK
- Success.
- ENOMEM
- Insufficient memory to initialize the condition variable
attribute object attr.
POSIX 1003.1 THR
Safety: | |
Cancellation point |
No |
Interrupt handler |
No |
Signal handler |
Yes |
Thread |
Yes |
pthread_condattr_destroy(),
pthread_cond_init()
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