| File: | pr/Linux4.19_x86_64_gcc_glibc_PTH_64_DBG.OBJ/pr/tests/../../../pr/tests/sem.c |
| Warning: | line 191, column 5 Value stored to 'r' is never read |
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| 1 | /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| 2 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| 3 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| 4 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| 5 | |
| 6 | /*********************************************************************** |
| 7 | ** |
| 8 | ** Name: sem.c |
| 9 | ** |
| 10 | ** Description: Tests Semaphonre functions. |
| 11 | ** |
| 12 | ** Modification History: |
| 13 | ** 20-May-97 AGarcia- Converted the test to accomodate the debug_mode flag. |
| 14 | ** The debug mode will print all of the printfs associated with this test. |
| 15 | ** The regress mode will be the default mode. Since the regress tool limits |
| 16 | ** the output to a one line status:PASS or FAIL,all of the printf statements |
| 17 | ** have been handled with an if (debug_mode) statement. |
| 18 | ** 04-June-97 AGarcia removed the Test_Result function. Regress tool has been updated to |
| 19 | ** recognize the return code from tha main program. |
| 20 | ***********************************************************************/ |
| 21 | |
| 22 | /*********************************************************************** |
| 23 | ** Includes |
| 24 | ***********************************************************************/ |
| 25 | /* Used to get the command line option */ |
| 26 | #include "plgetopt.h" |
| 27 | |
| 28 | #include "nspr.h" |
| 29 | #include "prpriv.h" |
| 30 | |
| 31 | #include <stdio.h> |
| 32 | #include <stdlib.h> |
| 33 | #include <string.h> |
| 34 | |
| 35 | PRIntn failed_already=0; |
| 36 | PRIntn debug_mode; |
| 37 | |
| 38 | /* |
| 39 | Since we don't have stdin, stdout everywhere, we will fake |
| 40 | it with our in-memory buffers called stdin and stdout. |
| 41 | */ |
| 42 | |
| 43 | #define SBSIZE1024 1024 |
| 44 | |
| 45 | #include "obsolete/prsem.h" |
| 46 | |
| 47 | static char stdinBuf[SBSIZE1024]; |
| 48 | static char stdoutBuf[SBSIZE1024]; |
| 49 | |
| 50 | static PRUintn stdinBufIdx = 0; |
| 51 | static PRUintn stdoutBufIdx = 0; |
| 52 | static PRStatus finalResult = PR_SUCCESS; |
| 53 | |
| 54 | |
| 55 | static size_t dread (PRUintn device, char *buf, size_t bufSize) |
| 56 | { |
| 57 | PRUintn i; |
| 58 | |
| 59 | /* during first read call, initialize the stdinBuf buffer*/ |
| 60 | if (stdinBufIdx == 0) { |
| 61 | for (i=0; i<SBSIZE1024; i++) { |
| 62 | stdinBuf[i] = i; |
| 63 | } |
| 64 | } |
| 65 | |
| 66 | /* now copy data from stdinBuf to the given buffer upto bufSize */ |
| 67 | for (i=0; i<bufSize; i++) { |
| 68 | if (stdinBufIdx == SBSIZE1024) { |
| 69 | break; |
| 70 | } |
| 71 | buf[i] = stdinBuf[stdinBufIdx++]; |
| 72 | } |
| 73 | |
| 74 | return i; |
| 75 | } |
| 76 | |
| 77 | static size_t dwrite (PRUintn device, char *buf, size_t bufSize) |
| 78 | { |
| 79 | PRUintn i, j; |
| 80 | |
| 81 | /* copy data from the given buffer upto bufSize to stdoutBuf */ |
| 82 | for (i=0; i<bufSize; i++) { |
| 83 | if (stdoutBufIdx == SBSIZE1024) { |
| 84 | break; |
| 85 | } |
| 86 | stdoutBuf[stdoutBufIdx++] = buf[i]; |
| 87 | } |
| 88 | |
| 89 | /* during last write call, compare the two buffers */ |
| 90 | if (stdoutBufIdx == SBSIZE1024) |
| 91 | for (j=0; j<SBSIZE1024; j++) |
| 92 | if (stdinBuf[j] != stdoutBuf[j]) { |
| 93 | if (debug_mode) { |
| 94 | printf("data mismatch for index= %d \n", j); |
| 95 | } |
| 96 | finalResult = PR_FAILURE; |
| 97 | } |
| 98 | |
| 99 | return i; |
| 100 | } |
| 101 | |
| 102 | /*------------------ Following is the real test program ---------*/ |
| 103 | /* |
| 104 | Program to copy standard input to standard output. The program |
| 105 | uses two threads. One reads the input and puts the data in a |
| 106 | double buffer. The other reads the buffer contents and writes |
| 107 | it to standard output. |
| 108 | */ |
| 109 | |
| 110 | PRSemaphore *emptyBufs; /* number of empty buffers */ |
| 111 | PRSemaphore *fullBufs; /* number of buffers that are full */ |
| 112 | |
| 113 | #define BSIZE100 100 |
| 114 | |
| 115 | struct { |
| 116 | char data[BSIZE100]; |
| 117 | PRUintn nbytes; /* number of bytes in this buffer */ |
| 118 | } buf[2]; |
| 119 | |
| 120 | static void PR_CALLBACK reader(void *arg) |
| 121 | { |
| 122 | PRUintn i = 0; |
| 123 | size_t nbytes; |
| 124 | |
| 125 | do { |
| 126 | (void) PR_WaitSem(emptyBufs); |
| 127 | nbytes = dread(0, buf[i].data, BSIZE100); |
| 128 | buf[i].nbytes = nbytes; |
| 129 | PR_PostSem(fullBufs); |
| 130 | i = (i + 1) % 2; |
| 131 | } while (nbytes > 0); |
| 132 | } |
| 133 | |
| 134 | static void writer(void) |
| 135 | { |
| 136 | PRUintn i = 0; |
| 137 | size_t nbytes; |
| 138 | |
| 139 | do { |
| 140 | (void) PR_WaitSem(fullBufs); |
| 141 | nbytes = buf[i].nbytes; |
| 142 | if (nbytes > 0) { |
| 143 | nbytes = dwrite(1, buf[i].data, nbytes); |
| 144 | PR_PostSem(emptyBufs); |
| 145 | i = (i + 1) % 2; |
| 146 | } |
| 147 | } while (nbytes > 0); |
| 148 | } |
| 149 | |
| 150 | int main(int argc, char **argv) |
| 151 | { |
| 152 | PRThread *r; |
| 153 | |
| 154 | PR_STDIO_INIT(); |
| 155 | PR_Init(PR_USER_THREAD, PR_PRIORITY_NORMAL, 0); |
| 156 | |
| 157 | { |
| 158 | /* The command line argument: -d is used to determine if the test is being run |
| 159 | in debug mode. The regress tool requires only one line output:PASS or FAIL. |
| 160 | All of the printfs associated with this test has been handled with a if (debug_mode) |
| 161 | test. |
| 162 | Usage: test_name -d |
| 163 | */ |
| 164 | PLOptStatus os; |
| 165 | PLOptState *opt = PL_CreateOptState(argc, argv, "d:"); |
| 166 | while (PL_OPT_EOL != (os = PL_GetNextOpt(opt))) |
| 167 | { |
| 168 | if (PL_OPT_BAD == os) { |
| 169 | continue; |
| 170 | } |
| 171 | switch (opt->option) |
| 172 | { |
| 173 | case 'd': /* debug mode */ |
| 174 | debug_mode = 1; |
| 175 | break; |
| 176 | default: |
| 177 | break; |
| 178 | } |
| 179 | } |
| 180 | PL_DestroyOptState(opt); |
| 181 | } |
| 182 | |
| 183 | /* main test */ |
| 184 | |
| 185 | emptyBufs = PR_NewSem(2); /* two empty buffers */ |
| 186 | |
| 187 | fullBufs = PR_NewSem(0); /* zero full buffers */ |
| 188 | |
| 189 | /* create the reader thread */ |
| 190 | |
| 191 | r = PR_CreateThread(PR_USER_THREAD, |
Value stored to 'r' is never read | |
| 192 | reader, 0, |
| 193 | PR_PRIORITY_NORMAL, |
| 194 | PR_LOCAL_THREAD, |
| 195 | PR_UNJOINABLE_THREAD, |
| 196 | 0); |
| 197 | |
| 198 | /* Do the writer operation in this thread */ |
| 199 | writer(); |
| 200 | |
| 201 | PR_DestroySem(emptyBufs); |
| 202 | PR_DestroySem(fullBufs); |
| 203 | |
| 204 | if (finalResult == PR_SUCCESS) { |
| 205 | if (debug_mode) { |
| 206 | printf("sem Test Passed.\n"); |
| 207 | } |
| 208 | } |
| 209 | else { |
| 210 | if (debug_mode) { |
| 211 | printf("sem Test Failed.\n"); |
| 212 | } |
| 213 | failed_already=1; |
| 214 | } |
| 215 | PR_Cleanup(); |
| 216 | if(failed_already) { |
| 217 | return 1; |
| 218 | } |
| 219 | else { |
| 220 | return 0; |
| 221 | } |
| 222 | } |