421 lines
9.7 KiB
C
421 lines
9.7 KiB
C
|
|
/*
|
|
* Copyright (C) 2000 Brian Paul All Rights Reserved.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included
|
|
* in all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
|
|
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
|
|
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
|
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
*/
|
|
|
|
|
|
/*
|
|
* This program tests GLX thread safety.
|
|
* Command line options:
|
|
* -n <num threads> Number of threads to create (default is 2)
|
|
* -display <display name> Specify X display (default is :0.0)
|
|
*
|
|
* Brian Paul 20 July 2000
|
|
*/
|
|
|
|
|
|
#if defined(PTHREADS) /* defined by Mesa on Linux and other platforms */
|
|
|
|
#include <GL/gl.h>
|
|
#include <GL/glx.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <pthread.h>
|
|
|
|
|
|
/*
|
|
* Each window/thread/context:
|
|
*/
|
|
struct winthread {
|
|
Display *Dpy;
|
|
int Index;
|
|
pthread_t Thread;
|
|
Window Win;
|
|
GLXContext Context;
|
|
float Angle;
|
|
int WinWidth, WinHeight;
|
|
GLboolean NewSize;
|
|
};
|
|
|
|
|
|
#define MAX_WINTHREADS 100
|
|
static struct winthread WinThreads[MAX_WINTHREADS];
|
|
static int NumWinThreads = 0;
|
|
static GLboolean ExitFlag = GL_FALSE;
|
|
|
|
|
|
|
|
static void
|
|
Error(const char *msg)
|
|
{
|
|
fprintf(stderr, "Error: %s\n", msg);
|
|
exit(1);
|
|
}
|
|
|
|
|
|
/* draw a colored cube */
|
|
static void
|
|
draw_object(void)
|
|
{
|
|
glPushMatrix();
|
|
glScalef(0.75, 0.75, 0.75);
|
|
|
|
glColor3f(1, 0, 0);
|
|
glBegin(GL_POLYGON);
|
|
glVertex3f(1, -1, -1);
|
|
glVertex3f(1, 1, -1);
|
|
glVertex3f(1, 1, 1);
|
|
glVertex3f(1, -1, 1);
|
|
glEnd();
|
|
|
|
glColor3f(0, 1, 1);
|
|
glBegin(GL_POLYGON);
|
|
glVertex3f(-1, -1, -1);
|
|
glVertex3f(-1, 1, -1);
|
|
glVertex3f(-1, 1, 1);
|
|
glVertex3f(-1, -1, 1);
|
|
glEnd();
|
|
|
|
glColor3f(0, 1, 0);
|
|
glBegin(GL_POLYGON);
|
|
glVertex3f(-1, 1, -1);
|
|
glVertex3f( 1, 1, -1);
|
|
glVertex3f( 1, 1, 1);
|
|
glVertex3f(-1, 1, 1);
|
|
glEnd();
|
|
|
|
glColor3f(1, 0, 1);
|
|
glBegin(GL_POLYGON);
|
|
glVertex3f(-1, -1, -1);
|
|
glVertex3f( 1, -1, -1);
|
|
glVertex3f( 1, -1, 1);
|
|
glVertex3f(-1, -1, 1);
|
|
glEnd();
|
|
|
|
glColor3f(0, 0, 1);
|
|
glBegin(GL_POLYGON);
|
|
glVertex3f(-1, -1, 1);
|
|
glVertex3f( 1, -1, 1);
|
|
glVertex3f( 1, 1, 1);
|
|
glVertex3f(-1, 1, 1);
|
|
glEnd();
|
|
|
|
glColor3f(1, 1, 0);
|
|
glBegin(GL_POLYGON);
|
|
glVertex3f(-1, -1, -1);
|
|
glVertex3f( 1, -1, -1);
|
|
glVertex3f( 1, 1, -1);
|
|
glVertex3f(-1, 1, -1);
|
|
glEnd();
|
|
glPopMatrix();
|
|
}
|
|
|
|
|
|
/* signal resize of given window */
|
|
static void
|
|
resize(struct winthread *wt, int w, int h)
|
|
{
|
|
wt->NewSize = GL_TRUE;
|
|
wt->WinWidth = w;
|
|
wt->WinHeight = h;
|
|
}
|
|
|
|
|
|
/*
|
|
* We have an instance of this for each thread.
|
|
*/
|
|
static void
|
|
draw_loop(struct winthread *wt)
|
|
{
|
|
while (!ExitFlag) {
|
|
|
|
glXMakeCurrent(wt->Dpy, wt->Win, wt->Context);
|
|
|
|
glEnable(GL_DEPTH_TEST);
|
|
|
|
if (wt->NewSize) {
|
|
GLfloat w = (float) wt->WinWidth / (float) wt->WinHeight;
|
|
glViewport(0, 0, wt->WinWidth, wt->WinHeight);
|
|
glMatrixMode(GL_PROJECTION);
|
|
glLoadIdentity();
|
|
glFrustum(-w, w, -1.0, 1.0, 1.5, 10);
|
|
glMatrixMode(GL_MODELVIEW);
|
|
glLoadIdentity();
|
|
glTranslatef(0, 0, -2.5);
|
|
wt->NewSize = GL_FALSE;
|
|
}
|
|
|
|
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
|
|
|
glPushMatrix();
|
|
glRotatef(wt->Angle, 0, 0, 1);
|
|
glRotatef(wt->Angle, 1, 0, 0);
|
|
glScalef(0.7, 0.7, 0.7);
|
|
draw_object();
|
|
glPopMatrix();
|
|
|
|
glXSwapBuffers(wt->Dpy, wt->Win);
|
|
|
|
wt->Angle += 1.0;
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* The main process thread runs this loop.
|
|
*/
|
|
static void
|
|
event_loop(Display *dpy)
|
|
{
|
|
while (!ExitFlag) {
|
|
static long mask = StructureNotifyMask | ExposureMask | KeyPressMask;
|
|
XEvent event;
|
|
int i;
|
|
|
|
for (i = 0; i < NumWinThreads; i++) {
|
|
struct winthread *wt = &WinThreads[i];
|
|
while (XCheckWindowEvent(dpy, wt->Win, mask, &event)) {
|
|
if (event.xany.window == wt->Win) {
|
|
switch (event.type) {
|
|
case ConfigureNotify:
|
|
resize(wt, event.xconfigure.width,
|
|
event.xconfigure.height);
|
|
break;
|
|
case KeyPress:
|
|
/* tell all threads to exit */
|
|
ExitFlag = GL_TRUE;
|
|
/*printf("exit draw_loop %d\n", wt->Index);*/
|
|
return;
|
|
default:
|
|
/*no-op*/ ;
|
|
}
|
|
}
|
|
else {
|
|
printf("window mismatch\n");
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* we'll call this once for each thread, before the threads are created.
|
|
*/
|
|
static void
|
|
create_window(struct winthread *wt)
|
|
{
|
|
Window win;
|
|
GLXContext ctx;
|
|
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 = 80, height = 80;
|
|
int xpos = (wt->Index % 10) * 90;
|
|
int ypos = (wt->Index / 10) * 100;
|
|
|
|
scrnum = DefaultScreen(wt->Dpy);
|
|
root = RootWindow(wt->Dpy, scrnum);
|
|
|
|
visinfo = glXChooseVisual(wt->Dpy, scrnum, attrib);
|
|
if (!visinfo) {
|
|
Error("Unable to find RGB, Z, double-buffered visual");
|
|
}
|
|
|
|
/* window attributes */
|
|
attr.background_pixel = 0;
|
|
attr.border_pixel = 0;
|
|
attr.colormap = XCreateColormap(wt->Dpy, root, visinfo->visual, AllocNone);
|
|
attr.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask;
|
|
mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
|
|
|
|
win = XCreateWindow(wt->Dpy, root, xpos, ypos, width, height,
|
|
0, visinfo->depth, InputOutput,
|
|
visinfo->visual, mask, &attr);
|
|
if (!win) {
|
|
Error("Couldn't create window");
|
|
}
|
|
|
|
{
|
|
XSizeHints sizehints;
|
|
sizehints.x = xpos;
|
|
sizehints.y = ypos;
|
|
sizehints.width = width;
|
|
sizehints.height = height;
|
|
sizehints.flags = USSize | USPosition;
|
|
XSetNormalHints(wt->Dpy, win, &sizehints);
|
|
XSetStandardProperties(wt->Dpy, win, "glthreads", "glthreads",
|
|
None, (char **)NULL, 0, &sizehints);
|
|
}
|
|
|
|
|
|
ctx = glXCreateContext(wt->Dpy, visinfo, NULL, True);
|
|
if (!ctx) {
|
|
Error("Couldn't create GLX context");
|
|
}
|
|
|
|
XMapWindow(wt->Dpy, win);
|
|
XSync(wt->Dpy, 0);
|
|
|
|
/* save the info for this window/context */
|
|
wt->Win = win;
|
|
wt->Context = ctx;
|
|
wt->Angle = 0.0;
|
|
wt->WinWidth = width;
|
|
wt->WinHeight = height;
|
|
wt->NewSize = GL_TRUE;
|
|
}
|
|
|
|
|
|
/*
|
|
* Called by pthread_create()
|
|
*/
|
|
static void *
|
|
thread_function(void *p)
|
|
{
|
|
struct winthread *wt = (struct winthread *) p;
|
|
draw_loop(wt);
|
|
return NULL;
|
|
}
|
|
|
|
|
|
/*
|
|
* called before exit to wait for all threads to finish
|
|
*/
|
|
static void
|
|
clean_up(void)
|
|
{
|
|
int i;
|
|
|
|
/* wait for threads to finish */
|
|
for (i = 0; i < NumWinThreads; i++) {
|
|
pthread_join(WinThreads[i].Thread, NULL);
|
|
}
|
|
|
|
for (i = 0; i < NumWinThreads; i++) {
|
|
glXDestroyContext(WinThreads[i].Dpy, WinThreads[i].Context);
|
|
XDestroyWindow(WinThreads[i].Dpy, WinThreads[i].Win);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
char *displayName = ":0.0";
|
|
int numThreads = 2;
|
|
Display *dpy;
|
|
int i;
|
|
Status threadStat;
|
|
|
|
if (argc == 1) {
|
|
printf("threadgl: test of GL thread safety (any key = exit)\n");
|
|
printf("Usage:\n");
|
|
printf(" threadgl [-display dpyName] [-n numthreads]\n");
|
|
}
|
|
else {
|
|
int i;
|
|
for (i = 1; i < argc; i++) {
|
|
if (strcmp(argv[i], "-display") == 0 && i + 1 < argc) {
|
|
displayName = argv[i + 1];
|
|
i++;
|
|
}
|
|
else if (strcmp(argv[i], "-n") == 0 && i + 1 < argc) {
|
|
numThreads = atoi(argv[i + 1]);
|
|
if (numThreads < 1)
|
|
numThreads = 1;
|
|
else if (numThreads > MAX_WINTHREADS)
|
|
numThreads = MAX_WINTHREADS;
|
|
i++;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* VERY IMPORTANT: call XInitThreads() before any other Xlib functions.
|
|
*/
|
|
threadStat = XInitThreads();
|
|
if (threadStat) {
|
|
printf("XInitThreads() returned %d (success)\n", (int) threadStat);
|
|
}
|
|
else {
|
|
printf("XInitThreads() returned 0 (failure- this program may fail)\n");
|
|
}
|
|
|
|
|
|
dpy = XOpenDisplay(displayName);
|
|
if (!dpy) {
|
|
fprintf(stderr, "Unable to open display %s\n", displayName);
|
|
return -1;
|
|
}
|
|
|
|
NumWinThreads = numThreads;
|
|
|
|
/* Create the GLX windows and contexts */
|
|
for (i = 0; i < numThreads; i++) {
|
|
WinThreads[i].Dpy = dpy;
|
|
WinThreads[i].Index = i;
|
|
create_window(&WinThreads[i]);
|
|
}
|
|
|
|
/* Create the threads */
|
|
for (i = 0; i < numThreads; i++) {
|
|
pthread_create(&WinThreads[i].Thread, NULL, thread_function,
|
|
(void*) &WinThreads[i]);
|
|
printf("Created Thread %p\n", WinThreads[i].Thread);
|
|
}
|
|
|
|
event_loop(dpy);
|
|
|
|
clean_up();
|
|
|
|
XCloseDisplay(dpy);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
#else /* PTHREADS */
|
|
|
|
|
|
#include <stdio.h>
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
printf("Sorry, this program wasn't compiled with PTHREADS defined.\n");
|
|
return 0;
|
|
}
|
|
|
|
|
|
#endif /* PTHREADS */
|