--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/graphicscomposition/openwfsupport/src/eglsynchelper.c Tue Feb 02 01:47:50 2010 +0200
@@ -0,0 +1,202 @@
+// Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of "Eclipse Public License v1.0"
+// which accompanies this distribution, and is available
+// at the URL "http://www.eclipse.org/legal/epl-v10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+// eglsynchelper.c
+//
+
+#include "eglsynchelper.h"
+#include "EGL/egltypes.h"
+
+#ifndef EGL_EGLEXT_PROTOTYPES
+
+#define EGLSYNC_TYPE 0xE5
+
+/* sync object data type for POSIX thread implementation*/
+
+typedef struct CondVarSync_* NativeSyncType;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*-------------------------------------------------------------------*//*!
+ * \brief Create a sync object for the specified display.
+ * \ingroup api
+ * \param dpy Identifier of the display which will own the sync object
+ * \param type Type of the sync object. EGL_SYNC_REUSABLE_KHR is only supported
+ * \param attrib_list Attribute-value list specifying attributes of the sync
+ * object, terminated by an attribute entry EGL_NONE
+ * \return Handle for the created sync object if successful, EGL_NO_SYNC_KHR otherwise
+ * \error EGL_BAD_DISPLAY if <dpy> is not a name of a valid EGLDisplay;
+ * EGL_NOT_INITIALIZED if the display object associated with the <dpy> has not been initialized;
+ * EGL_BAD_ATTRIBUTE if <attrib_list> is neither NULL nor empty (containing only EGL_NONE) or
+ * if <type> is not a supported type of sync object;
+ * EGL_BAD_ALLOC if the memory allocation related to sync object is not successful
+ * \note If <type> is EGL_SYNC_REUSABLE_KHR, a reusable sync object is created.
+ * In this case <attrib_list> must be NULL or empty (containing only EGL_NONE).
+ * *//*-------------------------------------------------------------------*/
+EGLSyncKHR eglCreateSyncKHR( EGLDisplay dpy,
+ EGLenum condition,
+ const EGLint *attrib_list )
+{
+ PFNEGLCREATESYNCKHRPROC createPointer = (PFNEGLCREATESYNCKHRPROC) eglGetProcAddress("eglCreateSyncKHR");
+
+ if (createPointer == NULL)
+ {
+ return EGL_NO_SYNC_KHR;
+ }
+ else
+ {
+ return createPointer(dpy, condition, attrib_list);
+ }
+}
+
+
+/*-------------------------------------------------------------------*//*!
+ * \brief Destroy a sync object and free memory associated with it
+ * \ingroup api
+ * \param dpy Identifier of the display which owns the sync object
+ * \param sync Sync object handle.
+ * \return EGL_TRUE if deletion was successful and EGL_FALSE otherwise
+ * \error EGL_BAD_DISPLAY if <dpy> is not a name of a valid EGLDisplay;
+ * EGL_NOT_INITIALIZED if the display object associated with the <dpy> has not been initialized;
+ * EGL_BAD_PARAMETER if <sync> is not a valid sync object for <dpy>
+ * \note If any eglClientWaitSyncKHR commands are blocking on <sync> when
+ * eglDestroySyncKHR is called, they will be woken up, as if <sync> were signaled.
+ * If no errors are generated, <sync> will no longer be the handle of a valid sync object.
+ *//*-------------------------------------------------------------------*/
+EGLBoolean eglDestroySyncKHR( EGLDisplay dpy, EGLSyncKHR sync )
+{
+ PFNEGLDESTROYSYNCKHRPROC destroyPointer = (PFNEGLDESTROYSYNCKHRPROC) eglGetProcAddress("eglDestroySyncKHR");
+
+ if (destroyPointer == NULL)
+ {
+ return EGL_FALSE;
+ }
+ else
+ {
+ return destroyPointer(dpy, sync);
+ }
+}
+
+/*-------------------------------------------------------------------*//*!
+ * \brief Blocks the calling thread until the specified sync object
+ * is signaled, or until <timeout> nanoseconds have passed.
+ * \ingroup api
+ * \param dpy Identifier of the display which owns the sync object.
+ * \param sync Sync object handle.
+ * \param flags If the EGL_FLUSH_COMMANDS_BIT_KHR bit is set in <flags>
+ * and <sync> is unsignaled when the function is called, then the equivalent
+ * of Flush() will be performed for the current API context.
+ * \param timeout The thread will be unblocked when <timeout> is expired.
+ * If the <timeout> is to zero, the function just test the current status
+ * of the sync object. If the <timeout> is set to EGL_FOREVER_KHR, then the
+ * function does not time out. For all other values, <timeout> is adjusted to
+ * the closest value which may be substantially longer than one nanosecond.
+ * \return EGL_CONDITION_SATISFIED if <sync> was signaled before
+ * the timeout expired, which includes the case when <sync> was already
+ * signaled when eglClientWaitSyncKHR was called; EGL_TIMEOUT_EXPIRED_KHR if the
+ * specified timeout period expired before <sync> was signaled;
+ * EGL_FALSE if an error occurs.
+ * \error EGL_BAD_DISPLAY if <dpy> is not a name of a valid EGLDisplay;
+ * EGL_NOT_INITIALIZED if the display object associated with the <dpy> has not been initialized;
+ * EGL_BAD_PARAMETER if <sync> is not a valid sync object for <dpy> or
+ * if <flags> does not equal to 0 or EGL_SYNC_FLUSH_COMMAND_BIT_KHR
+ * Note\ More than one eglClientWaitSyncKHR may be outstanding on the same <sync> at any given time.
+ * When there are multiple threads blocked on the same <sync> and the sync object is signaled,
+ * all such threads are released, but the order in which they are released is not defined.
+ * If a sync object is destroyed while an eglClientWaitSyncKHR is blocking on that object,
+ * eglClientWaitSyncKHR will unblock and return immediately, just as if the sync object
+ * had been signaled prior to being destroyed.
+ *//*-------------------------------------------------------------------*/
+EGLint eglClientWaitSyncKHR( EGLDisplay dpy,
+ EGLSyncKHR sync,
+ EGLint flags,
+ EGLTimeKHR timeout )
+{
+ PFNEGLCLIENTWAITSYNCKHRPROC clientWaitPointer = (PFNEGLCLIENTWAITSYNCKHRPROC) eglGetProcAddress("eglClientWaitSyncKHR");
+
+ if (clientWaitPointer == NULL)
+ {
+ return EGL_FALSE;
+ }
+ else
+ {
+ return clientWaitPointer(dpy, sync, flags, timeout);
+ }
+}
+
+/*-------------------------------------------------------------------*//*!
+ * \brief Signals or unsignals the reusable sync object.
+ * \ingroup api
+ * \param dpy Identifier of the display which owns the sync object.
+ * \param sync Sync object handle.
+ * \param mode Status of the sync object. There are two possible states:
+ * EGL_SIGNALED_KHR and EGL_UNSIGNALED_KHR.
+ * \return EGL_TRUE if an operation was successful and EGL_FALSE otherwise.
+ * \note The error code returned from eglSignalSyncImpl() will be generated
+ *//*-------------------------------------------------------------------*/
+EGLBoolean eglSignalSyncKHR( EGLDisplay dpy,
+ EGLSyncKHR sync,
+ EGLenum mode )
+{
+ PFNEGLSIGNALSYNCKHRPROC signalPointer = (PFNEGLSIGNALSYNCKHRPROC) eglGetProcAddress("eglSignalSyncKHR");
+
+ if (signalPointer == NULL)
+ {
+ return EGL_FALSE;
+ }
+ else
+ {
+ return signalPointer(dpy, sync, mode);
+ }
+}
+
+
+/*-------------------------------------------------------------------*//*!
+ * \brief Query an attribute of the sync object
+ * \ingroup api
+ * \param dpy Identifier of the display which owns the sync object
+ * \param sync Sync object handle.
+ * \param attribute An attribute to be retrieved.
+ * \param value Pointer to the value for the requested attribute which will be filled on function return.
+ * \return EGL_TRUE if an operation was successful and EGL_FALSE otherwise
+ * \error EGL_BAD_DISPLAY if <dpy> is not a name of a valid EGLDisplay;
+ * EGL_NOT_INITIALIZED if the display object associated with the <dpy> has not been initialized;
+ * EGL_BAD_PARAMETER if <sync> is not a valid sync object for <dpy> or if <value> is not
+ * a valid pointer; EGL_BAD_ATTRIBUTE if <attribute> does not lie within expected range;
+ * EGL_BAD_MATCH if <attribute> is not supported for the type of sync object passed in <sync>
+ *//*-------------------------------------------------------------------*/
+EGLBoolean eglGetSyncAttribKHR( EGLDisplay dpy,
+ EGLSyncKHR sync,
+ EGLint attribute,
+ EGLint *value )
+{
+ PFNEGLGETSYNCATTRIBKHRPROC getAttribPointer = (PFNEGLGETSYNCATTRIBKHRPROC) eglGetProcAddress("eglGetSyncAttribKHR");
+
+ if (getAttribPointer == NULL)
+ {
+ return EGL_FALSE;
+ }
+ else
+ {
+ return getAttribPointer(dpy, sync, attribute, value);
+ }
+}
+
+
+
+#ifdef __cplusplus
+}
+#endif
+#endif