test/testsem.c
author Alex Baines <alex@abaines.me.uk>
Tue, 19 Aug 2014 23:31:50 +0100
changeset 9097 56d712662a82
parent 8149 681eb46b8ac4
child 9356 e87d6e1e812a
permissions -rw-r--r--
Add a SDL_IM_INTERNAL_EDITING event to make IMs like iBus render editing text in its own UI instead of sending TEXTEDITING events.
This is useful for applications that handle TEXTINPUT events but not TEXTEDITING events.
     1 /*
     2   Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>
     3 
     4   This software is provided 'as-is', without any express or implied
     5   warranty.  In no event will the authors be held liable for any damages
     6   arising from the use of this software.
     7 
     8   Permission is granted to anyone to use this software for any purpose,
     9   including commercial applications, and to alter it and redistribute it
    10   freely.
    11 */
    12 
    13 /* Simple test of the SDL semaphore code */
    14 
    15 #include <stdio.h>
    16 #include <stdlib.h>
    17 #include <signal.h>
    18 
    19 #include "SDL.h"
    20 #include "SDL_thread.h"
    21 
    22 #define NUM_THREADS 10
    23 
    24 static SDL_sem *sem;
    25 int alive = 1;
    26 
    27 int SDLCALL
    28 ThreadFunc(void *data)
    29 {
    30     int threadnum = (int) (uintptr_t) data;
    31     while (alive) {
    32         SDL_SemWait(sem);
    33         SDL_Log("Thread number %d has got the semaphore (value = %d)!\n",
    34                 threadnum, SDL_SemValue(sem));
    35         SDL_Delay(200);
    36         SDL_SemPost(sem);
    37         SDL_Log("Thread number %d has released the semaphore (value = %d)!\n",
    38                 threadnum, SDL_SemValue(sem));
    39         SDL_Delay(1);           /* For the scheduler */
    40     }
    41     SDL_Log("Thread number %d exiting.\n", threadnum);
    42     return 0;
    43 }
    44 
    45 static void
    46 killed(int sig)
    47 {
    48     alive = 0;
    49 }
    50 
    51 static void
    52 TestWaitTimeout(void)
    53 {
    54     Uint32 start_ticks;
    55     Uint32 end_ticks;
    56     Uint32 duration;
    57     int retval;
    58 
    59     sem = SDL_CreateSemaphore(0);
    60     SDL_Log("Waiting 2 seconds on semaphore\n");
    61 
    62     start_ticks = SDL_GetTicks();
    63     retval = SDL_SemWaitTimeout(sem, 2000);
    64     end_ticks = SDL_GetTicks();
    65 
    66     duration = end_ticks - start_ticks;
    67 
    68     /* Accept a little offset in the effective wait */
    69     if (duration > 1900 && duration < 2050)
    70         SDL_Log("Wait done.\n");
    71     else
    72         SDL_Log("Wait took %d milliseconds\n", duration);
    73 
    74     /* Check to make sure the return value indicates timed out */
    75     if (retval != SDL_MUTEX_TIMEDOUT)
    76         SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "SDL_SemWaitTimeout returned: %d; expected: %d\n", retval, SDL_MUTEX_TIMEDOUT);
    77 }
    78 
    79 int
    80 main(int argc, char **argv)
    81 {
    82     SDL_Thread *threads[NUM_THREADS];
    83     uintptr_t i;
    84     int init_sem;
    85 
    86 	/* Enable standard application logging */
    87     SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
    88 
    89     if (argc < 2) {
    90         SDL_Log("Usage: %s init_value\n", argv[0]);
    91         return (1);
    92     }
    93 
    94     /* Load the SDL library */
    95     if (SDL_Init(0) < 0) {
    96         SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s\n", SDL_GetError());
    97         return (1);
    98     }
    99     signal(SIGTERM, killed);
   100     signal(SIGINT, killed);
   101 
   102     init_sem = atoi(argv[1]);
   103     sem = SDL_CreateSemaphore(init_sem);
   104 
   105     SDL_Log("Running %d threads, semaphore value = %d\n", NUM_THREADS,
   106            init_sem);
   107     /* Create all the threads */
   108     for (i = 0; i < NUM_THREADS; ++i) {
   109         char name[64];
   110         SDL_snprintf(name, sizeof (name), "Thread%u", (unsigned int) i);
   111         threads[i] = SDL_CreateThread(ThreadFunc, name, (void *) i);
   112     }
   113 
   114     /* Wait 10 seconds */
   115     SDL_Delay(10 * 1000);
   116 
   117     /* Wait for all threads to finish */
   118     SDL_Log("Waiting for threads to finish\n");
   119     alive = 0;
   120     for (i = 0; i < NUM_THREADS; ++i) {
   121         SDL_WaitThread(threads[i], NULL);
   122     }
   123     SDL_Log("Finished waiting for threads\n");
   124 
   125     SDL_DestroySemaphore(sem);
   126 
   127     TestWaitTimeout();
   128 
   129     SDL_Quit();
   130     return (0);
   131 }