Attachment 7414 Details for Bug 8645 – Test app to show the bug

Test app to show the bug

threadtest-bugreport.c (text/plain), 4.38 KB, created by Stefan Dösinger on 2006-10-14 12:34:36 UTC

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Creator: Stefan Dösinger

Created: 2006-10-14 12:34:36 UTC

Size: 4.38 KB

patch

obsolete

>#include <assert.h>
>#include <GL/gl.h>
>#include <GL/glx.h>
>#include <stdio.h>
>#include <stdlib.h>
>#include <string.h>
>#include <unistd.h>
>#include <pthread.h>
>
>Display *Dpy = NULL;
>Window Win = 0;
>GLXContext Context1, Context2;
>int ExitFlag = GL_FALSE;
>volatile int thread = 1;
>
>void createCtxes()
>{
>    int attrib[] = { GLX_RGBA,
>                     GLX_RED_SIZE, 1,
>                     GLX_GREEN_SIZE, 1,
>                     GLX_BLUE_SIZE, 1,
>                     GLX_DEPTH_SIZE, 1,
>                     GLX_DOUBLEBUFFER,
>                     None };
>    int scrnum;
>    XSetWindowAttributes attr;
>    unsigned long mask;
>    Window root;
>    XVisualInfo *visinfo;
>    int width = 300, height = 300;
>
>    scrnum = DefaultScreen(Dpy);
>    root = RootWindow(Dpy, scrnum);
>
>    visinfo = glXChooseVisual(Dpy, scrnum, attrib);
>    if (!visinfo) {
>        printf("Unable to find RGB, Z, double-buffered visual");
>        exit(0);
>    }
>
>    /* window attributes */
>    attr.background_pixel = 0;
>    attr.border_pixel = 0;
>    attr.colormap = XCreateColormap(Dpy, root, visinfo->visual, AllocNone);
>    attr.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask;
>    mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
>
>    Win = XCreateWindow(Dpy, root, 0, 0, width, height,
>                        0, visinfo->depth, InputOutput,
>                        visinfo->visual, mask, &attr);
>    if (!Win) {
>        printf("Couldn't create window");
>        exit(0);
>    }
>
>    {
>        XSizeHints sizehints;
>        sizehints.x = 0;
>        sizehints.y = 0;
>        sizehints.width  = width;
>        sizehints.height = height;
>        sizehints.flags = USSize | USPosition;
>        XSetNormalHints(Dpy, Win, &sizehints);
>        XSetStandardProperties(Dpy, Win, "glthreads", "glthreads",
>                               None, (char **)NULL, 0, &sizehints);
>    }
>
>    Context1 = glXCreateContext(Dpy, visinfo, NULL, True);
>    if (!Context1) {
>        printf("Couldn't create GLX context");
>        exit(0);
>    }
>    Context2 = glXCreateContext(Dpy, visinfo, Context1, True);
>    if (!Context2) {
>        printf("Couldn't create GLX context");
>        exit(0);
>    }
>
>    XMapWindow(Dpy, Win);
>    XSync(Dpy, 0);
>}
>
>static void
>event_loop(Display *dpy)
>{
>    XEvent event;
>    int i;
>
>    while (!ExitFlag) {
>       XNextEvent(dpy, &event);
>
>        switch (event.type) {
>            case KeyPress:
>                /* tell all threads to exit */
>                ExitFlag = GL_TRUE;
>                /*printf("exit draw_loop %d\n", wt->Index);*/
>                return;
>            default:
>            /*no-op*/ ;
>        }
>    }
>}
>
>static void *
>thread1_function(void *p)
>{
>    if(glXMakeCurrent(Dpy, Win, Context1) != GL_TRUE)
>    {
>        printf("glXMakeCurrent error\n");
>        return(0);
>    }
>
>    glEnable(GL_DEPTH_TEST);
>    glColor3f(0, 0, 1);
>    glDrawBuffer(GL_BACK);
>
>    while(!ExitFlag)
>    {
>        printf("draw1\n");
>
>        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
>
>        glBegin(GL_QUADS);
>        glVertex3f(0, 0, 0);
>        glVertex3f(0, 1, 0);
>        glVertex3f(1, 1, 0);
>        glVertex3f(1, 0, 0);
>        glEnd();
>        printf("done draw1\n");
>
>        thread = 2;
>
>        while(thread != 1 && !ExitFlag) usleep(1);
>        if(ExitFlag) return;
>
>        printf("Flip\n");
>        glFinish();
>        glXSwapBuffers(Dpy, Win);
>    }
>    return NULL;
>}
>
>static void *
>thread2_function(void *p)
>{
>    if(glXMakeCurrent(Dpy, Win, Context2) != GL_TRUE)
>    {
>        printf("glXMakeCurrent error\n");
>        return(0);
>    }
>
>    glColor3f(1,0, 0);
>    glDrawBuffer(GL_BACK);
>    glEnable(GL_DEPTH_TEST);
>
>    while(!ExitFlag)
>    {
>        while(thread != 2 && !ExitFlag) usleep(1);;
>        if(ExitFlag) return;
>        printf("draw2\n");
>
>        glBegin(GL_QUADS);
>        glVertex3f(0.5, 0.5,  0.1);
>        glVertex3f(0.5,  -1, 0.1);
>        glVertex3f(-1, -1, 0.1);
>        glVertex3f(-1,  0, 0.1);
>        glEnd();
>        printf("done draw2\n");
>        glFinish();
>        thread = 1;
>    }
>    return NULL;
>}
>
>int main(int argc, char *argv[])
>{
>    pthread_t Thread1, Thread2;
>    XInitThreads();
>    Dpy = XOpenDisplay(NULL);
>    if (!Dpy) {
>        fprintf(stderr, "Unable to open display %s\n", NULL);
>        return -1;
>    }
>
>    createCtxes();
>
>    pthread_create(&Thread1, NULL, thread1_function, NULL);
>    pthread_create(&Thread1, NULL, thread2_function, NULL);
>    event_loop(Dpy);
>
>    return 0;
>}

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Attachments on bug 8645: 7414

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