apple: Initial import of libGL for OSX from AppleSGLX svn repository.

Signed-off-by: Jeremy Huddleston <[email protected]>

1 files changed, 542 insertions, 0 deletions

diff --git a/src/glx/apple/apple_glx_drawable.c b/src/glx/apple/apple_glx_drawable.c
new file mode 100644
index 00000000000..55302243358
--- /dev/null
+++ b/src/glx/apple/apple_glx_drawable.c
@@ -0,0 +1,542 @@
+/*
+ Copyright (c) 2008, 2009 Apple Inc.
+ 
+ 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 THE ABOVE LISTED COPYRIGHT
+ HOLDER(S) 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.
+ 
+ Except as contained in this notice, the name(s) of the above
+ copyright holders shall not be used in advertising or otherwise to
+ promote the sale, use or other dealings in this Software without
+ prior written authorization.
+*/
+
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+#include <pthread.h>
+#include "apple_glx.h"
+#include "apple_glx_context.h"
+#include "apple_glx_drawable.h"
+#include "appledri.h"
+
+static pthread_mutex_t drawables_lock = PTHREAD_MUTEX_INITIALIZER;
+static struct apple_glx_drawable *drawables_list = NULL;
+
+static void
+lock_drawables_list(void)
+{
+   int err;
+
+   err = pthread_mutex_lock(&drawables_lock);
+
+   if (err) {
+      fprintf(stderr, "pthread_mutex_lock failure in %s: %d\n",
+              __func__, err);
+      abort();
+   }
+}
+
+static void
+unlock_drawables_list(void)
+{
+   int err;
+
+   err = pthread_mutex_unlock(&drawables_lock);
+
+   if (err) {
+      fprintf(stderr, "pthread_mutex_unlock failure in %s: %d\n",
+              __func__, err);
+      abort();
+   }
+}
+
+struct apple_glx_drawable *
+apple_glx_find_drawable(Display * dpy, GLXDrawable drawable)
+{
+   struct apple_glx_drawable *i, *agd = NULL;
+
+   lock_drawables_list();
+
+   for (i = drawables_list; i; i = i->next) {
+      if (i->drawable == drawable) {
+         agd = i;
+         break;
+      }
+   }
+
+   unlock_drawables_list();
+
+   return agd;
+}
+
+static void
+drawable_lock(struct apple_glx_drawable *agd)
+{
+   int err;
+
+   err = pthread_mutex_lock(&agd->mutex);
+
+   if (err) {
+      fprintf(stderr, "pthread_mutex_lock error: %d\n", err);
+      abort();
+   }
+}
+
+static void
+drawable_unlock(struct apple_glx_drawable *d)
+{
+   int err;
+
+   err = pthread_mutex_unlock(&d->mutex);
+
+   if (err) {
+      fprintf(stderr, "pthread_mutex_unlock error: %d\n", err);
+      abort();
+   }
+}
+
+
+static void
+reference_drawable(struct apple_glx_drawable *d)
+{
+   d->lock(d);
+   d->reference_count++;
+   d->unlock(d);
+}
+
+static void
+release_drawable(struct apple_glx_drawable *d)
+{
+   d->lock(d);
+   d->reference_count--;
+   d->unlock(d);
+}
+
+/* The drawables list must be locked prior to calling this. */
+/* Return true if the drawable was destroyed. */
+static bool
+destroy_drawable(struct apple_glx_drawable *d)
+{
+
+   d->lock(d);
+
+   if (d->reference_count > 0) {
+      d->unlock(d);
+      return false;
+   }
+
+   d->unlock(d);
+
+   if (d->previous) {
+      d->previous->next = d->next;
+   }
+   else {
+      /*
+       * The item must be at the head of the list, if it
+       * has no previous pointer. 
+       */
+      drawables_list = d->next;
+   }
+
+   if (d->next)
+      d->next->previous = d->previous;
+
+   unlock_drawables_list();
+
+   if (d->callbacks.destroy) {
+      /*
+       * Warning: this causes other routines to be called (potentially)
+       * from surface_notify_handler.  It's probably best to not have
+       * any locks at this point locked.
+       */
+      d->callbacks.destroy(d->display, d);
+   }
+
+   apple_glx_diagnostic("%s: freeing %p\n", __func__, (void *) d);
+
+   free(d);
+
+   /* So that the locks are balanced and the caller correctly unlocks. */
+   lock_drawables_list();
+
+   return true;
+}
+
+/*
+ * This is typically called when a context is destroyed or the current
+ * drawable is made None.
+ */
+static bool
+destroy_drawable_callback(struct apple_glx_drawable *d)
+{
+   bool result;
+
+   d->lock(d);
+
+   apple_glx_diagnostic("%s: %p ->reference_count before -- %d\n", __func__,
+                        (void *) d, d->reference_count);
+
+   d->reference_count--;
+
+   if (d->reference_count > 0) {
+      d->unlock(d);
+      return false;
+   }
+
+   d->unlock(d);
+
+   lock_drawables_list();
+
+   result = destroy_drawable(d);
+
+   unlock_drawables_list();
+
+   return result;
+}
+
+static bool
+is_pbuffer(struct apple_glx_drawable *d)
+{
+   return APPLE_GLX_DRAWABLE_PBUFFER == d->type;
+}
+
+static bool
+is_pixmap(struct apple_glx_drawable *d)
+{
+   return APPLE_GLX_DRAWABLE_PIXMAP == d->type;
+}
+
+static void
+common_init(Display * dpy, GLXDrawable drawable, struct apple_glx_drawable *d)
+{
+   int err;
+   pthread_mutexattr_t attr;
+
+   d->display = dpy;
+   d->reference_count = 0;
+   d->drawable = drawable;
+   d->type = -1;
+
+   err = pthread_mutexattr_init(&attr);
+
+   if (err) {
+      fprintf(stderr, "pthread_mutexattr_init error: %d\n", err);
+      abort();
+   }
+
+   /* 
+    * There are some patterns that require a recursive mutex,
+    * when working with locks that protect the apple_glx_drawable,
+    * and reference functions like ->reference, and ->release.
+    */
+   err = pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
+
+   if (err) {
+      fprintf(stderr, "error: setting pthread mutex type: %d\n", err);
+      abort();
+   }
+
+   err = pthread_mutex_init(&d->mutex, &attr);
+
+   if (err) {
+      fprintf(stderr, "pthread_mutex_init error: %d\n", err);
+      abort();
+   }
+
+   (void) pthread_mutexattr_destroy(&attr);
+
+   d->lock = drawable_lock;
+   d->unlock = drawable_unlock;
+
+   d->reference = reference_drawable;
+   d->release = release_drawable;
+
+   d->destroy = destroy_drawable_callback;
+
+   d->is_pbuffer = is_pbuffer;
+   d->is_pixmap = is_pixmap;
+
+   d->width = -1;
+   d->height = -1;
+   d->row_bytes = 0;
+   d->path[0] = '\0';
+   d->fd = -1;
+   d->buffer = NULL;
+   d->buffer_length = 0;
+
+   d->previous = NULL;
+   d->next = NULL;
+}
+
+static void
+link_tail(struct apple_glx_drawable *agd)
+{
+   lock_drawables_list();
+
+   /* Link the new drawable into the global list. */
+   agd->next = drawables_list;
+
+   if (drawables_list)
+      drawables_list->previous = agd;
+
+   drawables_list = agd;
+
+   unlock_drawables_list();
+}
+
+/*WARNING: this returns a locked and referenced object. */
+bool
+apple_glx_drawable_create(Display * dpy,
+                          int screen,
+                          GLXDrawable drawable,
+                          struct apple_glx_drawable **agdResult,
+                          struct apple_glx_drawable_callbacks *callbacks)
+{
+   struct apple_glx_drawable *d;
+
+   d = calloc(1, sizeof *d);
+
+   if (NULL == d) {
+      perror("malloc");
+      return true;
+   }
+
+   common_init(dpy, drawable, d);
+   d->type = callbacks->type;
+   d->callbacks = *callbacks;
+
+   d->reference(d);
+   d->lock(d);
+
+   link_tail(d);
+
+   apple_glx_diagnostic("%s: new drawable %p\n", __func__, (void *) d);
+
+   *agdResult = d;
+
+   return false;
+}
+
+static int error_count = 0;
+
+static int
+error_handler(Display * dpy, XErrorEvent * err)
+{
+   if (err->error_code == BadWindow) {
+      ++error_count;
+   }
+
+   return 0;
+}
+
+void
+apple_glx_garbage_collect_drawables(Display * dpy)
+{
+   struct apple_glx_drawable *d, *dnext;
+   Window root;
+   int x, y;
+   unsigned int width, height, bd, depth;
+   int (*old_handler) (Display *, XErrorEvent *);
+
+
+   if (NULL == drawables_list)
+      return;
+
+   old_handler = XSetErrorHandler(error_handler);
+
+   XSync(dpy, False);
+
+   lock_drawables_list();
+
+   for (d = drawables_list; d;) {
+      dnext = d->next;
+
+      d->lock(d);
+
+      if (d->reference_count > 0) {
+         /* 
+          * Skip this, because some context still retains a reference 
+          * to the drawable.
+          */
+         d->unlock(d);
+         d = dnext;
+         continue;
+      }
+
+      d->unlock(d);
+
+      error_count = 0;
+
+      /* 
+       * Mesa uses XGetWindowAttributes, but some of these things are 
+       * most definitely not Windows, and that's against the rules.
+       * XGetGeometry on the other hand is legal with a Pixmap and Window.
+       */
+      XGetGeometry(dpy, d->drawable, &root, &x, &y, &width, &height, &bd,
+                   &depth);
+
+      if (error_count > 0) {
+         /*
+          * Note: this may not actually destroy the drawable.
+          * If another context retains a reference to the drawable
+          * after the reference count test above. 
+          */
+         (void) destroy_drawable(d);
+         error_count = 0;
+      }
+
+      d = dnext;
+   }
+
+   XSetErrorHandler(old_handler);
+
+   unlock_drawables_list();
+}
+
+unsigned int
+apple_glx_get_drawable_count(void)
+{
+   unsigned int result = 0;
+   struct apple_glx_drawable *d;
+
+   lock_drawables_list();
+
+   for (d = drawables_list; d; d = d->next)
+      ++result;
+
+   unlock_drawables_list();
+
+   return result;
+}
+
+struct apple_glx_drawable *
+apple_glx_drawable_find_by_type(GLXDrawable drawable, int type, int flags)
+{
+   struct apple_glx_drawable *d;
+
+   lock_drawables_list();
+
+   for (d = drawables_list; d; d = d->next) {
+      if (d->type == type && d->drawable == drawable) {
+         if (flags & APPLE_GLX_DRAWABLE_REFERENCE)
+            d->reference(d);
+
+         if (flags & APPLE_GLX_DRAWABLE_LOCK)
+            d->lock(d);
+
+         unlock_drawables_list();
+
+         return d;
+      }
+   }
+
+   unlock_drawables_list();
+
+   return NULL;
+}
+
+struct apple_glx_drawable *
+apple_glx_drawable_find(GLXDrawable drawable, int flags)
+{
+   struct apple_glx_drawable *d;
+
+   lock_drawables_list();
+
+   for (d = drawables_list; d; d = d->next) {
+      if (d->drawable == drawable) {
+         if (flags & APPLE_GLX_DRAWABLE_REFERENCE)
+            d->reference(d);
+
+         if (flags & APPLE_GLX_DRAWABLE_LOCK)
+            d->lock(d);
+
+         unlock_drawables_list();
+
+         return d;
+      }
+   }
+
+   unlock_drawables_list();
+
+   return NULL;
+}
+
+/* Return true if the type is valid for the drawable. */
+bool
+apple_glx_drawable_destroy_by_type(Display * dpy,
+                                   GLXDrawable drawable, int type)
+{
+   struct apple_glx_drawable *d;
+
+   lock_drawables_list();
+
+   for (d = drawables_list; d; d = d->next) {
+      if (drawable == d->drawable && type == d->type) {
+         /*
+          * The user has requested that we destroy this resource.
+          * However, there may be references in the contexts to it, so
+          * release it, and call destroy_drawable which doesn't destroy
+          * if the reference_count is > 0.
+          */
+         d->release(d);
+
+         apple_glx_diagnostic("%s d->reference_count %d\n",
+                              __func__, d->reference_count);
+
+         destroy_drawable(d);
+         unlock_drawables_list();
+         return true;
+      }
+   }
+
+   unlock_drawables_list();
+
+   return false;
+}
+
+struct apple_glx_drawable *
+apple_glx_drawable_find_by_uid(unsigned int uid, int flags)
+{
+   struct apple_glx_drawable *d;
+
+   lock_drawables_list();
+
+   for (d = drawables_list; d; d = d->next) {
+      /* Only surfaces have a uid. */
+      if (APPLE_GLX_DRAWABLE_SURFACE == d->type) {
+         if (d->types.surface.uid == uid) {
+            if (flags & APPLE_GLX_DRAWABLE_REFERENCE)
+               d->reference(d);
+
+            if (flags & APPLE_GLX_DRAWABLE_LOCK)
+               d->lock(d);
+
+            unlock_drawables_list();
+
+            return d;
+         }
+      }
+   }
+
+   unlock_drawables_list();
+
+   return NULL;
+}