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ZCOM C I/F Library Routines

ZQSZE (3X)

Chapter 4292

ZQSZE (3X)

NAME zqsze – Read ZLU input queue size

SYNOPSIS

#include <zcom/zcomsys.h>

#include <zcom/zcomcall.h> /* if compiled with ANSI C (recommended) */

int32 zqsze (zap, zqhdp)

zaddr_type *zap;

zqhd_type *zqhdp;

DESCRIPTION Routine zqsze will return the queue header information, which includes

the number of messages, i.e., the number of buffers (zqhd_type->qnmsg)

queued to the specified program ZLU. An error is returned if the ZLU is

not a program ZLU.

The libraries libzcom_c.a and libpthread.a must be linked into the calling

program by giving the options “-lzcom_c -lpthread” to cc(1) or ld(1).

Threads

Considerations

This routine may be called from a multi-threaded application using the

POSIX (1003.1c) kernel threads API package. This routine has the

following characteristics when called by a multi-threaded application:

cancellation point Thread cancellation can occur when a thread

calls this routine.

async-cancel unsafe The calling thread’s cancelability type must be

PTHREAD_CANCEL_DEFERRED if

cancellation is enabled.

async-signal unsafe It cannot be called from a signal handler.

fork unsafe It cannot be called by a child process after

fork(2) but before exec(2).

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HP Advanced Communications Controllers (ACC) Guia do Utilizador Página 292