pthread_cond_getname_np()--Get Name of Condition Variable

 #include <pthread.h>
 int pthread_cond_getname_np(pthread_cond_t *cond,
                             char *name);

The pthread_cond_getname_np() function retrieves the name of the condition variable specified by cond. The buffer specified by name must be at least 16 characters in length. The returned thread name will be null terminated in the output buffer.

By default, each pthread_cond_t has the name "PTHREAD_COND" associated with it.

Note: This function is not portable.

Parameters

cond

(Input) The address of the condition variable object

name

(Output) Address of 16 byte buffer to receive the name

Authorities and Locks

None.

Return Value

0

pthread_cond_getname_np() was successful.

value

pthread_cond_getname_np() was not successful. value is set to indicate the error condition.

Error Conditions

If pthread_cond_getname_np() was not successful, the error condition returned usually indicates one of the following errors. Under some conditions, the value returned could indicate an error other than those listed here.

Usage Notes

• No CCSID conversion is performed when storing or displaying the name.
  
  

Related Information

• The <pthread.h> header file. See Header files for Pthread functions.
  
  
• pthread_cond_setname_np()--Set Name in Condtition Variable
  
  
• pthread_cond_init()--Initialize Condition Variable
  
  
• pthread_cond_destroy()--Destroy Condition Variable
  
  

Example

The following example will get the condition variable name.

Note: By using the code examples, you agree to the terms of the Code license and disclaimer information.

#define _MULTI_THREADED
#include <pthread.h>
#include <stdio.h>
#include <errno.h>
#include "check.h"

pthread_cond_t    cond;

int main(int argc, char **argv)
{
  int                   rc=0;
  pthread_condattr_t    cta;
  char conditionVariableName[16];

  printf("Enter Testcase - %s\n", argv[0]);

  printf("Create a default condition variable attribute\n");
  rc = pthread_condattr_init(&cta);
  checkResults("pthread_condattr_init\n", rc);

  printf("Create the condition variable using a condition variable attributes object\n");
  rc = pthread_cond_init(&cond, &cta);
  checkResults("pthread_cond_init\n", rc);

  memset(conditionVariableName, 0, sizeof(conditionVariableName));
  printf("Get the default name of the condition variable\n");
  rc = pthread_cond_getname_np(&cond, conditionVariableName);
  checkResults("pthread_cond_getname_np\n", rc);
  printf("The default condition variable name is: %.15s\n", conditionVariableName);

  printf("Destroy the condition variable\n");
  pthread_cond_destroy(&cond);

  printf("Main completed\n");
  return 0;
}

Enter Testcase - QP0WTEST/TPCRT0
Create a default condition variable attribute
Create the condition variable using a condition variable attributes object
Get the default name of the condition variable
The default condition variable name is: PTHREAD_COND
Destroy the condition variable
Main completed

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