Mercurial > sdl-ios-xcode
view test/torturethread.c @ 3496:78fc8ea578b2
Joe 2009-11-23 21:31:10 PST
If type is ::SDL_HAPTIC_CARTESIAN, direction is encoded by three positions
367 * (X axis, Y axis and Z axis (with 3 axes)). ::SDL_HAPTIC_CARTESIAN
uses
368 * the first three \c dir parameters. The cardinal directions would
be:
369 * - North: 0,-1, 0
370 * - East: -1, 0, 0
371 * - South: 0, 1, 0
372 * - West: 1, 0, 0
typedef struct SDL_HapticDirection
{
Uint8 type; /**< The type of encoding. */
Uint16 dir[3]; /**< The encoded direction. */
} SDL_HapticDirection;
An unsigned int can't store negative values and I don't see an alternate way to
encode them in the docs or source. The best I have been able to come up with is
using a negative magnitude for the effect but this will only get me 2 of the 4
quadrants in the plane for 2d effects. I looked at the win32 and linux
implementations and I believe is is safe to use signed ints in the direction
struct. I am unfamiliar with the darwin haptics API so I don't know if it is
safe.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Fri, 27 Nov 2009 19:29:27 +0000 |
parents | c121d94672cb |
children |
line wrap: on
line source
/* Simple test of the SDL threading code */ #include <stdio.h> #include <stdlib.h> #include <signal.h> #include <string.h> #include "SDL.h" #include "SDL_thread.h" #define NUMTHREADS 10 static char volatile time_for_threads_to_die[NUMTHREADS]; /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */ static void quit(int rc) { SDL_Quit(); exit(rc); } int SDLCALL SubThreadFunc(void *data) { while (!*(int volatile *) data) { ; /*SDL_Delay(10); *//* do nothing */ } return 0; } int SDLCALL ThreadFunc(void *data) { SDL_Thread *sub_threads[NUMTHREADS]; int flags[NUMTHREADS]; int i; int tid = (int) (uintptr_t) data; fprintf(stderr, "Creating Thread %d\n", tid); for (i = 0; i < NUMTHREADS; i++) { flags[i] = 0; sub_threads[i] = SDL_CreateThread(SubThreadFunc, &flags[i]); } printf("Thread '%d' waiting for signal\n", tid); while (time_for_threads_to_die[tid] != 1) { ; /* do nothing */ } printf("Thread '%d' sending signals to subthreads\n", tid); for (i = 0; i < NUMTHREADS; i++) { flags[i] = 1; SDL_WaitThread(sub_threads[i], NULL); } printf("Thread '%d' exiting!\n", tid); return 0; } int main(int argc, char *argv[]) { SDL_Thread *threads[NUMTHREADS]; int i; /* Load the SDL library */ if (SDL_Init(0) < 0) { fprintf(stderr, "Couldn't initialize SDL: %s\n", SDL_GetError()); return (1); } signal(SIGSEGV, SIG_DFL); for (i = 0; i < NUMTHREADS; i++) { time_for_threads_to_die[i] = 0; threads[i] = SDL_CreateThread(ThreadFunc, (void *) (uintptr_t) i); if (threads[i] == NULL) { fprintf(stderr, "Couldn't create thread: %s\n", SDL_GetError()); quit(1); } } for (i = 0; i < NUMTHREADS; i++) { time_for_threads_to_die[i] = 1; } for (i = 0; i < NUMTHREADS; i++) { SDL_WaitThread(threads[i], NULL); } SDL_Quit(); return (0); }