The Tor Browser: nsprpub/pr/tests/fsync.c@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     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/. */

     6 #include "prio.h"

     7 #include "prmem.h"

     8 #include "prprf.h"

     9 #include "prinrval.h"

    11 #include "plerror.h"

    12 #include "plgetopt.h"

    14 static PRFileDesc *err = NULL;

    16 static void Help(void)

    17 {

    18     PR_fprintf(err, "Usage: [-S] [-K <n>] [-h] <filename>\n");

    19     PR_fprintf(err, "\t-c   Nuber of iterations     (default: 10)\n");

    20     PR_fprintf(err, "\t-S   Sync the file           (default: FALSE)\n");

    21     PR_fprintf(err, "\t-K   Size of file (K bytes)  (default: 10)\n");

    22     PR_fprintf(err, "\t     Name of file to write   (default: /usr/tmp/sync.dat)\n");

    23     PR_fprintf(err, "\t-h   This message and nothing else\n");

    24 }  /* Help */

    26 int main(int argc, char **argv)

    27 {

    28     PRStatus rv;

    29     PLOptStatus os;

    30     PRUint8 *buffer;

    31     PRFileDesc *file = NULL;

    32     const char *filename = "sync.dat";

    33     PRUint32 index, loops, iterations = 10, filesize = 10;

    34     PRIntn flags = PR_WRONLY | PR_CREATE_FILE | PR_TRUNCATE;

    35     PLOptState *opt = PL_CreateOptState(argc, argv, "hSK:c:");

    36     PRIntervalTime time, total = 0, shortest = 0x7fffffff, longest = 0;

    38     err = PR_GetSpecialFD(PR_StandardError);

    40     while (PL_OPT_EOL != (os = PL_GetNextOpt(opt)))

    41     {

    42         if (PL_OPT_BAD == os) continue;

    43         switch (opt->option)

    44         {

    45         case 0:       /* Name of file to create */

    46             filename = opt->value;

    47             break;

    48         case 'S':       /* Use sych option on file */

    49             flags |= PR_SYNC;

    50             break;

    51         case 'K':       /* Size of file to write */

    52             filesize = atoi(opt->value);

    53             break;

    54         case 'c':       /* Number of iterations */

    55             iterations = atoi(opt->value);

    56             break;

    57         case 'h':       /* user wants some guidance */

    58         default:        /* user needs some guidance */

    59             Help();     /* so give him an earful */

    60             return 2;   /* but not a lot else */

    61         }

    62     }

    63     PL_DestroyOptState(opt);

    65     file = PR_Open(filename, flags, 0666);

    66     if (NULL == file)

    67     {

    68         PL_FPrintError(err, "Failed to open file");

    69         return 1;

    70     }

    72     buffer = (PRUint8*)PR_CALLOC(1024);

    73     if (NULL == buffer)

    74     {

    75         PL_FPrintError(err, "Cannot allocate buffer");

    76         return 1;

    77     }

    79     for (index = 0; index < sizeof(buffer); ++index)

    80         buffer[index] = (PRUint8)index;

    82     for (loops = 0; loops < iterations; ++loops)

    83     {

    84         time = PR_IntervalNow();

    85         for (index = 0; index < filesize; ++index)

    86         {

    87             PR_Write(file, buffer, 1024);

    88         }

    89         time = (PR_IntervalNow() - time);

    91         total += time;

    92         if (time < shortest) shortest = time;

    93         else if (time > longest) longest = time;

    94         if (0 != PR_Seek(file, 0, PR_SEEK_SET))

    95         {

    96            PL_FPrintError(err, "Rewinding file");

    97            return 1;

    98         }

    99     }

   101     total = total / iterations;

   102     PR_fprintf(

   103         err, "%u iterations over a %u kbyte %sfile: %u [%u] %u\n",

   104         iterations, filesize, ((flags & PR_SYNC) ? "SYNCH'd " : ""),

   105         PR_IntervalToMicroseconds(shortest),

   106         PR_IntervalToMicroseconds(total),

   107         PR_IntervalToMicroseconds(longest));

   109     PR_DELETE(buffer);

   110     rv = PR_Close(file);

   111     if (PR_SUCCESS != rv)

   112     {

   113         PL_FPrintError(err, "Closing file failed");

   114         return 1;

   115     }

   116     rv = PR_Delete(filename);

   117     if (PR_SUCCESS != rv)

   118     {

   119         PL_FPrintError(err, "Deleting file failed");

   120         return 1;

   121     }

   122     return 0;

   123 }

The Tor Browser / file revision