pthread_condattr_init()
QNX SDP8.0C Library ReferenceAPIDeveloper
Initialize the attribute object for creating condition variables
Synopsis:
#include <pthread.h>
int pthread_condattr_init( pthread_condattr_t* attr );
Arguments:
- attr
- A pointer to the pthread_condattr_t object that you want to initialize.
Library:
libc
Use the -l c option to qcc to link against this library. This library is usually included automatically.
Description:
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 a process-shared attribute, whose value is one of the following:
- 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.
The default is PTHREAD_PROCESS_PRIVATE. For more information about this attribute, see pthread_condattr_getpshared() and pthread_condattr_setpshared().
Returns:
- EOK
- Success.
- ENOMEM
- Insufficient memory to initialize the condition variable attribute object attr.
Classification:
| Safety: | |
|---|---|
| Cancellation point | No |
| Signal handler | Yes |
| Thread | Yes |
Page updated: