1 files changed, 306 insertions, 31 deletions

diff --git a/src/egl/main/egldisplay.c b/src/egl/main/egldisplay.c
index 47a2323eaf..feae1d6040 100644
--- a/src/egl/main/egldisplay.c
+++ b/src/egl/main/egldisplay.c
@@ -1,4 +1,3 @@
-
 /**
  * Functions related to EGLDisplay.
  */
@@ -7,11 +6,73 @@
 #include <stdlib.h>
 #include <string.h>
 #include "eglcontext.h"
+#include "eglsurface.h"
 #include "egldisplay.h"
 #include "egldriver.h"
 #include "eglglobals.h"
 #include "eglhash.h"
 #include "eglstring.h"
+#include "eglmutex.h"
+#include "egllog.h"
+
+
+static _EGL_DECLARE_MUTEX(_eglDisplayInitMutex);
+static _EGLHashtable *_eglDisplayHash;
+/* TODO surface hash table should be per-display */
+static _EGLHashtable *_eglSurfaceHash;
+
+
+/**
+ * Finish display management.
+ */
+static void
+_eglFiniDisplay(void)
+{
+   _eglLockMutex(&_eglDisplayInitMutex);
+   if (_eglDisplayHash) {
+      EGLuint key = _eglHashFirstEntry(_eglDisplayHash);
+
+      while (key) {
+         _EGLDisplay *dpy = (_EGLDisplay *)
+            _eglHashLookup(_eglDisplayHash, key);
+         assert(dpy);
+
+         if (dpy->ContextList || dpy->SurfaceList)
+            _eglLog(_EGL_DEBUG, "Display %u is destroyed with resources", key);
+
+         _eglCleanupDisplay(dpy);
+         free(dpy);
+
+         key = _eglHashNextEntry(_eglDisplayHash, key);
+      }
+
+      _eglDeleteHashTable(_eglDisplayHash);
+      _eglDisplayHash = NULL;
+      _eglDeleteHashTable(_eglSurfaceHash);
+      _eglSurfaceHash = NULL;
+   }
+   _eglUnlockMutex(&_eglDisplayInitMutex);
+}
+
+
+/* This can be avoided if hash table can be statically initialized */
+static INLINE void
+_eglInitDisplay(void)
+{
+   if (!_eglDisplayHash) {
+      _eglLockMutex(&_eglDisplayInitMutex);
+
+      /* check again after acquiring lock */
+      if (!_eglDisplayHash) {
+         _eglDisplayHash = _eglNewHashTable();
+         _eglSurfaceHash = _eglNewHashTable();
+
+         _eglAddAtExitCall(_eglFiniDisplay);
+      }
+
+      _eglUnlockMutex(&_eglDisplayInitMutex);
+   }
+}
 
 
 /**
@@ -25,16 +86,14 @@ _eglNewDisplay(NativeDisplayType nativeDisplay)
 {
    _EGLDisplay *dpy = (_EGLDisplay *) calloc(1, sizeof(_EGLDisplay));
    if (dpy) {
-      EGLuint key = _eglHashGenKey(_eglGlobal.Displays);
-
-      dpy->Handle = (EGLDisplay) key;
-      _eglHashInsert(_eglGlobal.Displays, key, dpy);
-
       dpy->NativeDisplay = nativeDisplay;
 #if defined(_EGL_PLATFORM_X)
       dpy->Xdpy = (Display *) nativeDisplay;
 #endif
 
+      _eglInitDisplay();
+      dpy->SurfaceHash = _eglSurfaceHash;
+
       dpy->DriverName = _eglChooseDriver(dpy);
       if (!dpy->DriverName) {
          free(dpy);
@@ -46,8 +105,44 @@ _eglNewDisplay(NativeDisplayType nativeDisplay)
 
 
 /**
- * Return the public handle for an internal _EGLDisplay.
- * This is the inverse of _eglLookupDisplay().
+ * Link a display to itself and return the handle of the link.
+ * The handle can be passed to client directly.
+ */
+EGLDisplay
+_eglLinkDisplay(_EGLDisplay *dpy)
+{
+   EGLuint key;
+
+   _eglInitDisplay();
+
+   key = _eglHashGenKey(_eglDisplayHash);
+   assert(key);
+   /* "link" the display to the hash table */
+   _eglHashInsert(_eglDisplayHash, key, dpy);
+   dpy->Handle = (EGLDisplay) _eglUIntToPointer(key);
+
+   return dpy->Handle;
+}
+
+
+/**
+ * Unlink a linked display from itself.
+ * Accessing an unlinked display should generate EGL_BAD_DISPLAY error.
+ */
+void
+_eglUnlinkDisplay(_EGLDisplay *dpy)
+{
+   EGLuint key = _eglPointerToUInt((void *) dpy->Handle);
+
+   _eglInitDisplay();
+
+   _eglHashRemove(_eglDisplayHash, key);
+   dpy->Handle = EGL_NO_DISPLAY;
+}
+
+
+/**
+ * Return the handle of a linked display, or EGL_NO_DISPLAY.
  */
 EGLDisplay
 _eglGetDisplayHandle(_EGLDisplay *display)
@@ -58,42 +153,78 @@ _eglGetDisplayHandle(_EGLDisplay *display)
       return EGL_NO_DISPLAY;
 }
 
- 
+
 /**
- * Return the _EGLDisplay object that corresponds to the given public/
- * opaque display handle.
- * This is the inverse of _eglGetDisplayHandle().
+ * Lookup a handle to find the linked display.
+ * Return NULL if the handle has no corresponding linked display.
  */
 _EGLDisplay *
 _eglLookupDisplay(EGLDisplay dpy)
 {
-   EGLuint key = (EGLuint) dpy;
-   if (!_eglGlobal.Displays)
-      return NULL;
-   return (_EGLDisplay *) _eglHashLookup(_eglGlobal.Displays, key);
+   EGLuint key = _eglPointerToUInt((void *) dpy);
+
+   _eglInitDisplay();
+
+   return (_EGLDisplay *) _eglHashLookup(_eglDisplayHash, key);
 }
 
 
-void
-_eglSaveDisplay(_EGLDisplay *dpy)
+/**
+ * Find the display corresponding to the specified native display id in all
+ * linked displays.
+ */
+_EGLDisplay *
+_eglFindDisplay(NativeDisplayType nativeDisplay)
 {
-   EGLuint key = _eglHashGenKey(_eglGlobal.Displays);
-   assert(dpy);
-   assert(!dpy->Handle);
-   dpy->Handle = (EGLDisplay) key;
-   assert(dpy->Handle);
-   _eglHashInsert(_eglGlobal.Displays, key, dpy);
+   EGLuint key;
+
+   _eglInitDisplay();
+
+   /* Walk the hash table.  Should switch to list if it is a problem. */
+   key = _eglHashFirstEntry(_eglDisplayHash);
+   while (key) {
+      _EGLDisplay *dpy = (_EGLDisplay *)
+            _eglHashLookup(_eglDisplayHash, key);
+      assert(dpy);
+
+      if (dpy->NativeDisplay == nativeDisplay)
+         return dpy;
+      key = _eglHashNextEntry(_eglDisplayHash, key);
+   }
+
+   return NULL;
 }
 
 
-_EGLDisplay *
-_eglGetCurrentDisplay(void)
+/**
+ * Destroy the contexts and surfaces that are linked to the display.
+ */
+void
+_eglReleaseDisplayResources(_EGLDriver *drv, EGLDisplay dpy)
 {
-   _EGLContext *ctx = _eglGetCurrentContext();
-   if (ctx)
-      return ctx->Display;
-   else
-      return NULL;
+   _EGLDisplay *display;
+   _EGLContext *contexts;
+   _EGLSurface *surfaces;
+
+   display = _eglLookupDisplay(dpy);
+   if (!display)
+      return;
+   contexts = display->ContextList;
+   surfaces = display->SurfaceList;
+
+   while (contexts) {
+      EGLContext handle = _eglGetContextHandle(contexts);
+      contexts = contexts->Next;
+      drv->API.DestroyContext(drv, dpy, handle);
+   }
+   assert(!display->ContextList);
+
+   while (surfaces) {
+      EGLSurface handle = _eglGetSurfaceHandle(surfaces);
+      surfaces = surfaces->Next;
+      drv->API.DestroySurface(drv, dpy, handle);
+   }
+   assert(!display->SurfaceList);
 }
 
 
@@ -119,3 +250,147 @@ _eglCleanupDisplay(_EGLDisplay *disp)
 
    /* driver deletes the _EGLDisplay object */
 }
+
+
+/**
+ * Link a context to a display and return the handle of the link.
+ * The handle can be passed to client directly.
+ */
+EGLContext
+_eglLinkContext(_EGLContext *ctx, _EGLDisplay *dpy)
+{
+   ctx->Display = dpy;
+   ctx->Next = dpy->ContextList;
+   dpy->ContextList = ctx;
+   return (EGLContext) ctx;
+}
+
+
+/**
+ * Unlink a linked context from its display.
+ * Accessing an unlinked context should generate EGL_BAD_CONTEXT error.
+ */
+void
+_eglUnlinkContext(_EGLContext *ctx)
+{
+   _EGLContext *prev;
+
+   prev = ctx->Display->ContextList;
+   if (prev != ctx) {
+      while (prev) {
+         if (prev->Next == ctx)
+            break;
+         prev = prev->Next;
+      }
+      assert(prev);
+      prev->Next = ctx->Next;
+   }
+   else {
+      ctx->Display->ContextList = ctx->Next;
+   }
+
+   ctx->Next = NULL;
+   ctx->Display = NULL;
+}
+
+
+/**
+ * Return the handle of a linked context, or EGL_NO_CONTEXT.
+ */
+EGLContext
+_eglGetContextHandle(_EGLContext *ctx)
+{
+   return (EGLContext) ((ctx && ctx->Display) ? ctx : EGL_NO_CONTEXT);
+}
+
+
+/**
+ * Lookup a handle to find the linked context.
+ * Return NULL if the handle has no corresponding linked context.
+ */
+_EGLContext *
+_eglLookupContext(EGLContext ctx)
+{
+   _EGLContext *context = (_EGLContext *) ctx;
+   return (context && context->Display) ? context : NULL;
+}
+
+
+/**
+ * Link a surface to a display and return the handle of the link.
+ * The handle can be passed to client directly.
+ */
+EGLSurface
+_eglLinkSurface(_EGLSurface *surf, _EGLDisplay *dpy)
+{
+   EGLuint key;
+
+   surf->Display = dpy;
+   surf->Next = dpy->SurfaceList;
+   dpy->SurfaceList = surf;
+
+   key = _eglHashGenKey(dpy->SurfaceHash);
+   assert(key);
+   _eglHashInsert(dpy->SurfaceHash, key, surf);
+
+   surf->Handle = (EGLSurface) _eglUIntToPointer(key);
+   return surf->Handle;
+}
+
+
+/**
+ * Unlink a linked surface from its display.
+ * Accessing an unlinked surface should generate EGL_BAD_SURFACE error.
+ */
+void
+_eglUnlinkSurface(_EGLSurface *surf)
+{
+   _EGLSurface *prev;
+   EGLuint key = _eglPointerToUInt((void *) surf->Handle);
+
+   _eglHashRemove(surf->Display->SurfaceHash, key);
+   surf->Handle = EGL_NO_SURFACE;
+
+   prev = surf->Display->SurfaceList;
+   if (prev != surf) {
+      while (prev) {
+         if (prev->Next == surf)
+            break;
+         prev = prev->Next;
+      }
+      assert(prev);
+      prev->Next = surf->Next;
+   }
+   else {
+      prev = NULL;
+      surf->Display->SurfaceList = surf->Next;
+   }
+
+   surf->Next = NULL;
+   surf->Display = NULL;
+}
+
+
+/**
+ * Return the handle of a linked surface, or EGL_NO_SURFACE.
+ */
+EGLSurface
+_eglGetSurfaceHandle(_EGLSurface *surface)
+{
+   if (surface)
+      return surface->Handle;
+   else
+      return EGL_NO_SURFACE;
+}
+
+
+/**
+ * Lookup a handle to find the linked surface.
+ * Return NULL if the handle has no corresponding linked surface.
+ */
+_EGLSurface *
+_eglLookupSurface(EGLSurface surf)
+{
+   EGLuint key = _eglPointerToUInt((void *) surf);
+   return (_EGLSurface *) _eglHashLookup(_eglSurfaceHash, key);
+}