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227 lines
7.0 KiB
227 lines
7.0 KiB
/*
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*
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* Copyright (c) International Business Machines Corp., 2001
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/*
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* FILE : pth_str02.c
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* DESCRIPTION : Create n threads
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* HISTORY:
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* 05/16/2001 Paul Larson (plars@us.ibm.com)
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* -Ported
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*
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*/
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#include <pthread.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include "test.h"
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/* Defines
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*
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* DEFAULT_NUM_THREADS: Default number of threads to create,
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* user can specifiy with [-n] command line option.
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*
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* USAGE: usage statement
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*/
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#define DEFAULT_NUM_THREADS 10
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#define USAGE "\nUsage: %s [-l | -n num_threads] [-d]\n\n" \
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"\t-l Test as many as threads as possible\n" \
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"\t-n num_threads Number of threads to create\n" \
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"\t-d Debug option\n\n"
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/*
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* Function prototypes
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*
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* sys_error (): System error message function
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* error (): Error message function
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* parse_args (): Parses command line arguments
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*/
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static void sys_error(const char *, int);
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static void error(const char *, int);
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static void parse_args(int, char **);
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void *thread(void *);
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/*
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* Global Variables
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*/
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int num_threads = DEFAULT_NUM_THREADS;
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int test_limit = 0;
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int debug = 0;
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char *TCID = "pth_str02";
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int TST_TOTAL = 1;
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/*---------------------------------------------------------------------+
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| main () |
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| ==================================================================== |
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| |
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| Function: Main program (see prolog for more details) |
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| |
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+---------------------------------------------------------------------*/
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int main(int argc, char **argv)
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{
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/*
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* Parse command line arguments and print out program header
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*/
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parse_args(argc, argv);
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if (test_limit) {
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tst_resm(TINFO, "Creating as many threads as possible");
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} else {
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tst_resm(TINFO, "Creating %d threads", num_threads);
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}
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thread(0);
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/*
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* Program completed successfully...
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*/
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tst_resm(TPASS, "Test passed");
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exit(0);
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}
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/*---------------------------------------------------------------------+
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| thread () |
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| ==================================================================== |
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| |
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| Function: Recursively creates threads while num < num_threads |
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| |
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+---------------------------------------------------------------------*/
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void *thread(void *parm)
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{
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intptr_t num = (intptr_t) parm;
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pthread_t th;
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pthread_attr_t attr;
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size_t stacksize = 1046528;
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int pcrterr;
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/*
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* Create threads while num < num_threads...
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*/
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if (test_limit || (num < num_threads)) {
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if (pthread_attr_init(&attr))
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sys_error("pthread_attr_init failed", __LINE__);
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if (pthread_attr_setstacksize(&attr, stacksize))
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sys_error("pthread_attr_setstacksize failed", __LINE__);
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if (pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE))
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sys_error("pthread_attr_setdetachstate failed",
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__LINE__);
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/************************************************/
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/* pthread_create does not touch errno. It RETURNS the error
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* if it fails. errno has no bearing on this test, so it was
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* removed and replaced with return value check(see man page
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* for pthread_create();
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*/
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pcrterr = pthread_create(&th, &attr, thread, (void *)(num + 1));
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if (pcrterr != 0) {
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if (test_limit) {
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tst_resm(TINFO,
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"Testing pthread limit, %d pthreads created.",
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(int)num);
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pthread_exit(0);
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}
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if (pcrterr == EAGAIN) {
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tst_resm(TINFO,
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"Thread [%d]: unable to create more threads!",
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(int)num);
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return NULL;
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} else
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sys_error("pthread_create failed", __LINE__);
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}
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pthread_join(th, NULL);
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}
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return 0;
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/*
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pthread_exit(0);
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*/
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}
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/*---------------------------------------------------------------------+
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| parse_args () |
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| ==================================================================== |
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| |
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| Function: Parse the command line arguments & initialize global |
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| variables. |
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| |
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+---------------------------------------------------------------------*/
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static void parse_args(int argc, char **argv)
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{
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int i;
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int errflag = 0;
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char *program_name = *argv;
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while ((i = getopt(argc, argv, "dln:?")) != EOF) {
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switch (i) {
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case 'd': /* debug option */
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debug++;
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break;
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case 'l': /* test pthread limit */
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test_limit++;
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break;
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case 'n': /* number of threads */
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num_threads = atoi(optarg);
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break;
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case '?':
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errflag++;
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break;
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}
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}
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/* If any errors exit program */
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if (errflag) {
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fprintf(stderr, USAGE, program_name);
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exit(2);
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}
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}
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/*---------------------------------------------------------------------+
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| sys_error () |
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| ==================================================================== |
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| Function: Creates system error message and calls error () |
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+---------------------------------------------------------------------*/
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static void sys_error(const char *msg, int line)
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{
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char syserr_msg[256];
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sprintf(syserr_msg, "%s: %s\n", msg, strerror(errno));
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error(syserr_msg, line);
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}
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/*---------------------------------------------------------------------+
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| error () |
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| ==================================================================== |
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| Function: Prints out message and exits... |
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+---------------------------------------------------------------------*/
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static void error(const char *msg, int line)
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{
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fprintf(stderr, "ERROR [line: %d] %s\n", line, msg);
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tst_resm(TFAIL, "Test failed");
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exit(-1);
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}
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