argp/tst-argp1.c

   1 /* Copyright (C) 2002-2017 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <argp.h>
  20
  21
  22
  23
  24 #define OPT_TO_THREAD           300
  25 #define OPT_TO_PROCESS          301
  26 #define OPT_SYNC_SIGNAL         302
  27 #define OPT_SYNC_JOIN           303
  28 #define OPT_TOPLEVEL            304
  29
  30
  31 static const struct argp_option test_options[] =
  32   {
  33     { NULL, 0, NULL, 0, "\
  34 This is a test for threads so we allow ther user to selection the number of \
  35 threads which are used at any one time.  Independently the total number of \
  36 rounds can be selected.  This is the total number of threads which will have \
  37 run when the process terminates:" },
  38     { "threads", 't', "NUMBER", 0, "Number of threads used at once" },
  39     { "starts", 's', "NUMBER", 0, "Total number of working threads" },
  40     { "toplevel", OPT_TOPLEVEL, "NUMBER", 0,
  41       "Number of toplevel threads which start the other threads; this \
  42 implies --sync-join" },
  43
  44     { NULL, 0, NULL, 0, "\
  45 Each thread can do one of two things: sleep or do work.  The latter is 100% \
  46 CPU bound.  The work load is the probability a thread does work.  All values \
  47 from zero to 100 (inclusive) are valid.  How often each thread repeats this \
  48 can be determined by the number of rounds.  The work cost determines how long \
  49 each work session (not sleeping) takes.  If it is zero a thread would \
  50 effectively nothing.  By setting the number of rounds to zero the thread \
  51 does no work at all and pure thread creation times can be measured." },
  52     { "workload", 'w', "PERCENT", 0, "Percentage of time spent working" },
  53     { "workcost", 'c', "NUMBER", 0,
  54       "Factor in the cost of each round of working" },
  55     { "rounds", 'r', "NUMBER", 0, "Number of rounds each thread runs" },
  56
  57     { NULL, 0, NULL, 0, "\
  58 There are a number of different methods how thread creation can be \
  59 synchronized.  Synchronization is necessary since the number of concurrently \
  60 running threads is limited." },
  61     { "sync-signal", OPT_SYNC_SIGNAL, NULL, 0,
  62       "Synchronize using a signal (default)" },
  63     { "sync-join", OPT_SYNC_JOIN, NULL, 0, "Synchronize using pthread_join" },
  64
  65     { NULL, 0, NULL, 0, "\
  66 One parameter for each threads execution is the size of the stack.  If this \
  67 parameter is not used the system's default stack size is used.  If many \
  68 threads are used the stack size should be chosen quite small." },
  69     { "stacksize", 'S', "BYTES", 0, "Size of threads stack" },
  70     { "guardsize", 'g', "BYTES", 0,
  71       "Size of stack guard area; must fit into the stack" },
  72
  73     { NULL, 0, NULL, 0, "Signal options:" },
  74     { "to-thread", OPT_TO_THREAD, NULL, 0, "Send signal to main thread" },
  75     { "to-process", OPT_TO_PROCESS, NULL, 0,
  76       "Send signal to process (default)" },
  77
  78     { NULL, 0, NULL, 0, "Administrative options:" },
  79     { "progress", 'p', NULL, 0, "Show signs of progress" },
  80     { "timing", 'T', NULL, 0,
  81       "Measure time from startup to the last thread finishing" },
  82     { NULL, 0, NULL, 0, NULL }
  83   };
  84
  85 /* Prototype for option handler.  */
  86 static error_t parse_opt (int key, char *arg, struct argp_state *state);
  87
  88 /* Data structure to communicate with argp functions.  */
  89 static struct argp argp =
  90 {
  91   test_options, parse_opt
  92 };
  93
  94
  95 static int
  96 do_test (void)
  97 {
  98   int argc = 2;
  99   char *argv[3] = { (char *) "tst-argp1", (char *) "--help", NULL };
 100   int remaining;
 101
 102   /* Parse and process arguments.  */
 103   argp_parse (&argp, argc, argv, 0, &remaining, NULL);
 104
 105   return 0;
 106 }
 107
 108
 109 /* Handle program arguments.  */
 110 static error_t
 111 parse_opt (int key, char *arg, struct argp_state *state)
 112 {
 113   return ARGP_ERR_UNKNOWN;
 114 }
 115
 116 #define TEST_FUNCTION do_test ()
 117 #include "../test-skeleton.c"