* Client-side GLX interface for current context management.
*/
-#ifdef HAVE_PTHREAD
#include <pthread.h>
-#endif
#include "glxclient.h"
-#ifdef GLX_USE_APPLEGL
-#include <stdlib.h>
-
-#include "apple_glx.h"
-#include "apple_glx_context.h"
-#endif
-
#include "glapi.h"
+#include "glx_error.h"
/*
** We setup some dummy structures here so that the API can be used
* Current context management and locking
*/
-#if defined( HAVE_PTHREAD )
-
_X_HIDDEN pthread_mutex_t __glXmutex = PTHREAD_MUTEX_INITIALIZER;
-# if defined( GLX_USE_TLS )
+# if defined( USE_ELF_TLS )
/**
* Per-thread GLX context pointer.
return (v == NULL) ? &dummyContext : (struct glx_context *) v;
}
-# endif /* defined( GLX_USE_TLS ) */
-
-#elif defined( THREADS )
-
-#error Unknown threading method specified.
-
-#else
-
-/* not thread safe */
-_X_HIDDEN struct glx_context *__glXcurrentContext = &dummyContext;
-
-#endif
+# endif /* defined( USE_ELF_TLS ) */
_X_HIDDEN void
#endif
}
-_X_EXPORT GLXContext
+_GLX_PUBLIC GLXContext
glXGetCurrentContext(void)
{
struct glx_context *cx = __glXGetCurrentContext();
}
}
-_X_EXPORT GLXDrawable
+_GLX_PUBLIC GLXDrawable
glXGetCurrentDrawable(void)
{
struct glx_context *gc = __glXGetCurrentContext();
return gc->currentDrawable;
}
+static Bool
+SendMakeCurrentRequest(Display * dpy, GLXContextID gc_id,
+ GLXContextTag gc_tag, GLXDrawable draw,
+ GLXDrawable read, GLXContextTag *out_tag)
+{
+ xGLXMakeCurrentReply reply;
+ Bool ret;
+ int opcode = __glXSetupForCommand(dpy);
+
+ LockDisplay(dpy);
+
+ if (draw == read) {
+ xGLXMakeCurrentReq *req;
+
+ GetReq(GLXMakeCurrent, req);
+ req->reqType = opcode;
+ req->glxCode = X_GLXMakeCurrent;
+ req->drawable = draw;
+ req->context = gc_id;
+ req->oldContextTag = gc_tag;
+ }
+ else {
+ struct glx_display *priv = __glXInitialize(dpy);
+
+ if ((priv->majorVersion > 1) || (priv->minorVersion >= 3)) {
+ xGLXMakeContextCurrentReq *req;
+
+ GetReq(GLXMakeContextCurrent, req);
+ req->reqType = opcode;
+ req->glxCode = X_GLXMakeContextCurrent;
+ req->drawable = draw;
+ req->readdrawable = read;
+ req->context = gc_id;
+ req->oldContextTag = gc_tag;
+ }
+ else {
+ xGLXVendorPrivateWithReplyReq *vpreq;
+ xGLXMakeCurrentReadSGIReq *req;
+
+ GetReqExtra(GLXVendorPrivateWithReply,
+ sz_xGLXMakeCurrentReadSGIReq -
+ sz_xGLXVendorPrivateWithReplyReq, vpreq);
+ req = (xGLXMakeCurrentReadSGIReq *) vpreq;
+ req->reqType = opcode;
+ req->glxCode = X_GLXVendorPrivateWithReply;
+ req->vendorCode = X_GLXvop_MakeCurrentReadSGI;
+ req->drawable = draw;
+ req->readable = read;
+ req->context = gc_id;
+ req->oldContextTag = gc_tag;
+ }
+ }
+
+ ret = _XReply(dpy, (xReply *) &reply, 0, False);
+
+
+ if (ret == 1)
+ *out_tag = reply.contextTag;
+
+ UnlockDisplay(dpy);
+ SyncHandle();
+
+ return ret;
+}
+
static void
-__glXGenerateError(Display * dpy, XID resource,
- BYTE errorCode, CARD16 minorCode)
+SetGC(struct glx_context *gc, Display *dpy, GLXDrawable draw, GLXDrawable read)
{
- xError error;
-
- error.errorCode = errorCode;
- error.resourceID = resource;
- error.sequenceNumber = dpy->request;
- error.type = X_Error;
- error.majorCode = __glXSetupForCommand(dpy);
- error.minorCode = minorCode;
- _XError(dpy, &error);
+ gc->currentDpy = dpy;
+ gc->currentDrawable = draw;
+ gc->currentReadable = read;
+}
+
+static Bool
+should_send(Display *dpy, struct glx_context *gc)
+{
+ /* always send for indirect contexts */
+ if (!gc->isDirect)
+ return 1;
+
+ /* don't send for broken servers. */
+ if (VendorRelease(dpy) < 12006000 || VendorRelease(dpy) >= 40000000)
+ return 0;
+
+ return 1;
}
-/**
- * Make a particular context current.
- *
- * \note This is in this file so that it can access dummyContext.
- */
static Bool
MakeContextCurrent(Display * dpy, GLXDrawable draw,
GLXDrawable read, GLXContext gc_user)
{
struct glx_context *gc = (struct glx_context *) gc_user;
struct glx_context *oldGC = __glXGetCurrentContext();
+ Bool ret = GL_FALSE;
/* Make sure that the new context has a nonzero ID. In the request,
* a zero context ID is used only to mean that we bind to no current
}
_glapi_check_multithread();
-
__glXLock();
+
if (oldGC == gc &&
- gc->currentDrawable == draw && gc->currentReadable == read) {
- __glXUnlock();
- return True;
+ gc->currentDrawable == draw &&
+ gc->currentReadable == read) {
+ /* Same context and drawables: no op, just return */
+ ret = GL_TRUE;
}
- if (oldGC != &dummyContext) {
- if (--oldGC->thread_refcount == 0) {
- oldGC->vtable->unbind(oldGC, gc);
- oldGC->currentDpy = 0;
+ else if (oldGC == gc) {
+ /* Same context and new drawables: update drawable bindings */
+ if (should_send(dpy, gc)) {
+ if (!SendMakeCurrentRequest(dpy, gc->xid, gc->currentContextTag,
+ draw, read, &gc->currentContextTag)) {
+ goto out;
+ }
}
- }
- if (gc) {
- /* Attempt to bind the context. We do this before mucking with
- * gc and __glXSetCurrentContext to properly handle our state in
- * case of an error.
- *
- * If an error occurs, set the Null context since we've already
- * blown away our old context. The caller is responsible for
- * figuring out how to handle setting a valid context.
- */
- if (gc->vtable->bind(gc, oldGC, draw, read) != Success) {
+ if (gc->vtable->bind(gc, gc, draw, read) != Success) {
__glXSetCurrentContextNull();
- __glXUnlock();
- __glXGenerateError(dpy, None, GLXBadContext, X_GLXMakeContextCurrent);
- return GL_FALSE;
+ goto out;
}
+ }
- if (gc->thread_refcount == 0) {
- gc->currentDpy = dpy;
- gc->currentDrawable = draw;
- gc->currentReadable = read;
+ else {
+ /* Different contexts: release the old, bind the new */
+ GLXContextTag oldTag = oldGC->currentContextTag;
+
+ if (oldGC != &dummyContext) {
+
+ if (--oldGC->thread_refcount == 0) {
+ if (oldGC->xid != None &&
+ should_send(dpy, oldGC) &&
+ !SendMakeCurrentRequest(dpy, None, oldTag, None, None,
+ &oldGC->currentContextTag)) {
+ goto out;
+ }
+
+ oldGC->vtable->unbind(oldGC, gc);
+
+ if (oldGC->xid == None) {
+ /* destroyed context, free it */
+ oldGC->vtable->destroy(oldGC);
+ oldTag = 0;
+ } else {
+ SetGC(oldGC, NULL, None, None);
+ oldTag = oldGC->currentContextTag;
+ }
+ }
}
- gc->thread_refcount++;
- __glXSetCurrentContext(gc);
- } else {
__glXSetCurrentContextNull();
- }
- if (oldGC->thread_refcount == 0 && oldGC != &dummyContext && oldGC->xid == None) {
- /* We are switching away from a context that was
- * previously destroyed, so we need to free the memory
- * for the old handle. */
- oldGC->vtable->destroy(oldGC);
+ if (gc) {
+ /*
+ * MESA_multithread_makecurrent makes this complicated. We need to
+ * send the request if the new context is
+ *
+ * a) indirect (may be current to another client), or
+ * b) (direct and) newly being made current, or
+ * c) (direct and) being bound to new drawables
+ */
+ Bool new_drawables = gc->currentReadable != read ||
+ gc->currentDrawable != draw;
+
+ if (should_send(dpy, gc)) {
+ if (!gc->isDirect || !gc->thread_refcount || new_drawables) {
+ if (!SendMakeCurrentRequest(dpy, gc->xid, oldTag, draw, read,
+ &gc->currentContextTag)) {
+ goto out;
+ }
+ }
+ }
+
+ if (gc->vtable->bind(gc, oldGC, draw, read) != Success) {
+ __glXSendError(dpy, GLXBadContext, None, X_GLXMakeContextCurrent,
+ False);
+ goto out;
+ }
+
+ if (gc->thread_refcount == 0) {
+ SetGC(gc, dpy, draw, read);
+ }
+ gc->thread_refcount++;
+ __glXSetCurrentContext(gc);
+ }
}
+ ret = GL_TRUE;
+out:
__glXUnlock();
-
- return GL_TRUE;
+ return ret;
}
-_X_EXPORT Bool
+_GLX_PUBLIC Bool
glXMakeCurrent(Display * dpy, GLXDrawable draw, GLXContext gc)
{
return MakeContextCurrent(dpy, draw, draw, gc);
}
-_X_EXPORT
+_GLX_PUBLIC
GLX_ALIAS(Bool, glXMakeCurrentReadSGI,
(Display * dpy, GLXDrawable d, GLXDrawable r, GLXContext ctx),
(dpy, d, r, ctx), MakeContextCurrent)
-_X_EXPORT
+_GLX_PUBLIC
GLX_ALIAS(Bool, glXMakeContextCurrent,
(Display * dpy, GLXDrawable d, GLXDrawable r,
GLXContext ctx), (dpy, d, r, ctx), MakeContextCurrent)
projects / mesa.git / blobdiff