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/* -*- 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,
0);
/* 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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