mesa: Move robustness code to main/robustness.c

Signed-off-by: Kristian Høgsberg Kristensen <[email protected]>
Reviewed-by: Jason Ekstrand <[email protected]>
Reviewed-by: Brian Paul <[email protected]>

1 files changed, 165 insertions, 0 deletions

diff --git a/src/mesa/main/robustness.c b/src/mesa/main/robustness.c
new file mode 100644
index 00000000000..f54d9f3eb1e
--- /dev/null
+++ b/src/mesa/main/robustness.c
@@ -0,0 +1,165 @@
+/*
+ * Copyright © 2016 Intel Corporation
+ *
+ * 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 (including the next
+ * paragraph) 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 AUTHORS OR COPYRIGHT HOLDERS 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.
+ */
+
+#include <stdbool.h>
+#include "context.h"
+#include "debug_output.h"
+#include "get.h"
+#include "mtypes.h"
+#include "macros.h"
+#include "main/dispatch.h" /* for _gloffset_COUNT */
+
+static void GLAPIENTRY
+_context_lost_GetSynciv(GLsync sync, GLenum pname, GLsizei bufSize,
+                        GLsizei *length, GLint *values)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   if (ctx)
+      _mesa_error(ctx, GL_CONTEXT_LOST, "GetSynciv(invalid call)");
+
+   if (pname == GL_SYNC_STATUS && bufSize >= 1)
+      *values = GL_SIGNALED;
+}
+
+static void GLAPIENTRY
+_context_lost_GetQueryObjectuiv(GLuint id, GLenum pname, GLuint *params)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   if (ctx)
+      _mesa_error(ctx, GL_CONTEXT_LOST, "GetQueryObjectuiv(context lost)");
+
+   if (pname == GL_QUERY_RESULT_AVAILABLE)
+      *params = GL_TRUE;
+}
+
+static int
+context_lost_nop_handler(void)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   if (ctx)
+      _mesa_error(ctx, GL_CONTEXT_LOST, "context lost");
+
+   return 0;
+}
+
+void
+_mesa_set_context_lost_dispatch(struct gl_context *ctx)
+{
+   if (ctx->ContextLost == NULL) {
+      int numEntries = MAX2(_glapi_get_dispatch_table_size(), _gloffset_COUNT);
+
+      ctx->ContextLost = malloc(numEntries * sizeof(_glapi_proc));
+      if (!ctx->ContextLost)
+         return;
+
+      _glapi_proc *entry = (_glapi_proc *) ctx->ContextLost;
+      unsigned i;
+      for (i = 0; i < numEntries; i++)
+         entry[i] = (_glapi_proc) context_lost_nop_handler;
+
+      /* The ARB_robustness specification says:
+       *
+       *    "* GetError and GetGraphicsResetStatus behave normally following a
+       *       graphics reset, so that the application can determine a reset
+       *       has occurred, and when it is safe to destroy and recreate the
+       *       context.
+       *
+       *     * Any commands which might cause a polling application to block
+       *       indefinitely will generate a CONTEXT_LOST error, but will also
+       *       return a value indicating completion to the application. Such
+       *       commands include:
+       *
+       *        + GetSynciv with <pname> SYNC_STATUS ignores the other
+       *          parameters and returns SIGNALED in <values>.
+       *
+       *        + GetQueryObjectuiv with <pname> QUERY_RESULT_AVAILABLE
+       *          ignores the other parameters and returns TRUE in <params>."
+       */
+      SET_GetError(ctx->ContextLost, _mesa_GetError);
+      SET_GetGraphicsResetStatusARB(ctx->ContextLost, _mesa_GetGraphicsResetStatusARB);
+      SET_GetSynciv(ctx->ContextLost, _context_lost_GetSynciv);
+      SET_GetQueryObjectuiv(ctx->ContextLost, _context_lost_GetQueryObjectuiv);
+   }
+
+   ctx->CurrentDispatch = ctx->ContextLost;
+   _glapi_set_dispatch(ctx->CurrentDispatch);
+}
+
+/**
+ * Returns an error code specified by GL_ARB_robustness, or GL_NO_ERROR.
+ * \return current context status
+ */
+GLenum GLAPIENTRY
+_mesa_GetGraphicsResetStatusARB( void )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   GLenum status = GL_NO_ERROR;
+
+   /* The ARB_robustness specification says:
+    *
+    *     "If the reset notification behavior is NO_RESET_NOTIFICATION_ARB,
+    *     then the implementation will never deliver notification of reset
+    *     events, and GetGraphicsResetStatusARB will always return NO_ERROR."
+    */
+   if (ctx->Const.ResetStrategy == GL_NO_RESET_NOTIFICATION_ARB) {
+      if (MESA_VERBOSE & VERBOSE_API)
+         _mesa_debug(ctx,
+                     "glGetGraphicsResetStatusARB always returns GL_NO_ERROR "
+                     "because reset notifictation was not requested at context "
+                     "creation.\n");
+
+      return GL_NO_ERROR;
+   }
+
+   if (ctx->Driver.GetGraphicsResetStatus) {
+      /* Query the reset status of this context from the driver core.
+       */
+      status = ctx->Driver.GetGraphicsResetStatus(ctx);
+
+      mtx_lock(&ctx->Shared->Mutex);
+
+      /* If this context has not been affected by a GPU reset, check to see if
+       * some other context in the share group has been affected by a reset.
+       * If another context saw a reset but this context did not, assume that
+       * this context was not guilty.
+       */
+      if (status != GL_NO_ERROR) {
+         ctx->Shared->ShareGroupReset = true;
+      } else if (ctx->Shared->ShareGroupReset && !ctx->ShareGroupReset) {
+         status = GL_INNOCENT_CONTEXT_RESET_ARB;
+      }
+
+      ctx->ShareGroupReset = ctx->Shared->ShareGroupReset;
+      mtx_unlock(&ctx->Shared->Mutex);
+   }
+
+   if (status != GL_NO_ERROR)
+      _mesa_set_context_lost_dispatch(ctx);
+
+   if (!ctx->Driver.GetGraphicsResetStatus && (MESA_VERBOSE & VERBOSE_API))
+      _mesa_debug(ctx,
+                  "glGetGraphicsResetStatusARB always returns GL_NO_ERROR "
+                  "because the driver doesn't track reset status.\n");
+
+   return status;
+}