The Tor Browser: nsprpub/pr/tests/sem.c@4ab42b5ab56c (annotated)

nsprpub/pr/tests/sem.c@4ab42b5ab56c (annotated)

nsprpub/pr/tests/sem.c

Wed, 31 Dec 2014 07:53:36 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 07:53:36 +0100
branch: TOR_BUG_3246
changeset 5: 4ab42b5ab56c
permissions: -rw-r--r--

Correct small whitespace inconsistency, lost while renaming variables.

 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 /***********************************************************************
 **
 ** Name: sem.c
 **
 ** Description: Tests Semaphonre functions.
 **
 ** Modification History:
 ** 20-May-97 AGarcia- Converted the test to accomodate the debug_mode flag.
 **	         The debug mode will print all of the printfs associated with this test.
 **			 The regress mode will be the default mode. Since the regress tool limits
 **           the output to a one line status:PASS or FAIL,all of the printf statements
 **			 have been handled with an if (debug_mode) statement.
 ** 04-June-97 AGarcia removed the Test_Result function. Regress tool has been updated to
 **			recognize the return code from tha main program.
 ***********************************************************************/
 /***********************************************************************
 ** Includes
 ***********************************************************************/
 /* Used to get the command line option */
 #include "plgetopt.h"
 #include "nspr.h"
 #include "prpriv.h"
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 PRIntn failed_already=0;
 PRIntn debug_mode;
 /*
 	Since we don't have stdin, stdout everywhere, we will fake
 	it with our in-memory buffers called stdin and stdout.
 */
 #define SBSIZE 1024
 #include "obsolete/prsem.h"
 static char stdinBuf[SBSIZE];
 static char stdoutBuf[SBSIZE];
 static PRUintn stdinBufIdx = 0;
 static PRUintn stdoutBufIdx = 0;
 static PRStatus finalResult = PR_SUCCESS;
 static size_t dread (PRUintn device, char *buf, size_t bufSize)
 {
 	PRUintn	i;
 	/* during first read call, initialize the stdinBuf buffer*/
 	if (stdinBufIdx == 0) {
 		for (i=0; i<SBSIZE; i++)
 			stdinBuf[i] = i;
 	}
 	/* now copy data from stdinBuf to the given buffer upto bufSize */
 	for (i=0; i<bufSize; i++) {
 		if (stdinBufIdx == SBSIZE)
 			break;
 		buf[i] = stdinBuf[stdinBufIdx++];
 	}
 	return i;
 }
 static size_t dwrite (PRUintn device, char *buf, size_t bufSize)
 {
 	PRUintn	i, j;
 	/* copy data from the given buffer upto bufSize to stdoutBuf */
 	for (i=0; i<bufSize; i++) {
 		if (stdoutBufIdx == SBSIZE)
 			break;
 		stdoutBuf[stdoutBufIdx++] = buf[i];
 	}
 	/* during last write call, compare the two buffers */
 	if (stdoutBufIdx == SBSIZE)
 		for (j=0; j<SBSIZE; j++)
 			if (stdinBuf[j] != stdoutBuf[j]) {
 				if (debug_mode) printf("data mismatch for index= %d \n", j);
 				finalResult = PR_FAILURE;
 			}
 	return i;
 }
 /*------------------ Following is the real test program ---------*/
 /*
 	Program to copy standard input to standard output.  The program
 	uses two threads.  One reads the input and puts the data in a
 	double buffer.  The other reads the buffer contents and writes
 	it to standard output.
 */
 PRSemaphore	*emptyBufs;	/* number of empty buffers */
 PRSemaphore *fullBufs;	/* number of buffers that are full */
 #define BSIZE	100
 struct {
 	char data[BSIZE];
 	PRUintn nbytes;		/* number of bytes in this buffer */
 } buf[2];
 static void PR_CALLBACK reader(void *arg)
 {
 	PRUintn	i = 0;
 	size_t	nbytes;
 	do {
 		(void) PR_WaitSem(emptyBufs);
 		nbytes = dread(0, buf[i].data, BSIZE);
 		buf[i].nbytes = nbytes;
 		PR_PostSem(fullBufs);
 		i = (i + 1) % 2;
 	} while (nbytes > 0);
 }
 static void writer(void)
 {
 	PRUintn	i = 0;
 	size_t	nbytes;
 	do {
 		(void) PR_WaitSem(fullBufs);
 		nbytes = buf[i].nbytes;
 		if (nbytes > 0) {
 			nbytes = dwrite(1, buf[i].data, nbytes);
 			PR_PostSem(emptyBufs);
 			i = (i + 1) % 2;
 		}
 	} while (nbytes > 0);
 }
 int main(int argc, char **argv)
 {
 	PRThread *r;
     PR_STDIO_INIT();
     PR_Init(PR_USER_THREAD, PR_PRIORITY_NORMAL, 0);
     {
     	/* The command line argument: -d is used to determine if the test is being run
     	in debug mode. The regress tool requires only one line output:PASS or FAIL.
     	All of the printfs associated with this test has been handled with a if (debug_mode)
     	test.
     	Usage: test_name -d
     	*/
     	PLOptStatus os;
     	PLOptState *opt = PL_CreateOptState(argc, argv, "d:");
     	while (PL_OPT_EOL != (os = PL_GetNextOpt(opt)))
         {
     		if (PL_OPT_BAD == os) continue;
             switch (opt->option)
             {
             case 'd':  /* debug mode */
     			debug_mode = 1;
                 break;
              default:
                 break;
             }
         }
     	PL_DestroyOptState(opt);
     }
  /* main test */
     emptyBufs = PR_NewSem(2);	/* two empty buffers */
     fullBufs = PR_NewSem(0);	/* zero full buffers */
 	/* create the reader thread */
 	r = PR_CreateThread(PR_USER_THREAD,
 				      reader, 0,
 				      PR_PRIORITY_NORMAL,
 				      PR_LOCAL_THREAD,
     				  PR_UNJOINABLE_THREAD,
 );
 	/* Do the writer operation in this thread */
 	writer();
 	PR_DestroySem(emptyBufs);
 	PR_DestroySem(fullBufs);
 	if (finalResult == PR_SUCCESS) {
 		if (debug_mode) printf("sem Test Passed.\n");
 	}
 	else{
 		if (debug_mode) printf("sem Test Failed.\n");
 		failed_already=1;
 	}
     PR_Cleanup();
 	if(failed_already)
 		return 1;
 	else
 		return 0;
 }

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nsprpub/pr/tests/sem.c@4ab42b5ab56c (annotated)

nsprpub/pr/tests/sem.c