shmem_short_wait_until

Purpose

Waits for a variable on the local processing element (PE) to change.

C syntax

#include <shmem.h>
 
void shmem_short_wait_until(short *var, int cond, short value);
 

Parameters

INPUT
ivar
A remotely accessible integer variable that is being updated by a remote PE.
cond
The compare operator that compares var with value. The following are the supported cond values:

SHMEM_CMP_EQ Equal

SHMEM_CMP_NE Not equal

SHMEM_CMP_GT Greater then

SHMEM_CMP_LE Less then or equal

SHMEM_CMP_LT Less then operator

SHMEM_CMP_GE Greater then or equal.

value
The right operand of the compare operator cond. The left one is the value pointed by var.

Description

This function is used for point-to-point synchronization. It suspends the execution of the calling PE until the value of the symmetric variable var is changed

The function shmem_short_wait_until() blocks the calling PE until some remote PE changes the short variable var to satisfy the condition implied by comp and val.

C examples



Related information

Subroutines: shmem_put


OpenSHMEM API Index