mapi: add new _glapi_new_nop_table() and _glapi_set_nop_handler()

_glapi_new_nop_table() creates a new dispatch table populated with
pointers to no-op functions.

_glapi_set_nop_handler() is used to register a callback function which
will be called from each of the no-op functions.

Now we always generate a separate no-op function for each GL entrypoint.
This allows us to do proper stack clean-up for Windows __stdcall and
lets us report the actual function name in error messages.  Before this
change, for non-Windows release builds we used a single no-op function
for all entrypoints.

Reviewed-by: Jose Fonseca <[email protected]>

1 files changed, 23 insertions, 0 deletions

diff --git a/src/mapi/mapi_glapi.c b/src/mapi/mapi_glapi.c
index 127dfafac30..70605f3dfa1 100644
--- a/src/mapi/mapi_glapi.c
+++ b/src/mapi/mapi_glapi.c
@@ -27,6 +27,7 @@
  */
 
 #include <string.h>
+#include <stdlib.h>
 #include "glapi/glapi.h"
 #include "u_current.h"
 #include "table.h" /* for MAPI_TABLE_NUM_SLOTS */
@@ -222,6 +223,28 @@ _glapi_get_proc_name(unsigned int offset)
    return stub ? stub_get_name(stub) : NULL;
 }
 
+/** Return pointer to new dispatch table filled with no-op functions */
+struct _glapi_table *
+_glapi_new_nop_table(unsigned num_entries)
+{
+   struct _glapi_table *table;
+
+   if (num_entries > MAPI_TABLE_NUM_SLOTS)
+      num_entries = MAPI_TABLE_NUM_SLOTS;
+
+   table = malloc(num_entries * sizeof(mapi_func));
+   if (table) {
+      memcpy(table, table_noop_array, num_entries * sizeof(mapi_func));
+   }
+   return table;
+}
+
+void
+_glapi_set_nop_handler(_glapi_nop_handler_proc func)
+{
+   table_set_noop_handler(func);
+}
+
 /**
  * This is a deprecated function which should not be used anymore.
  * It's only present to satisfy linking with older versions of libGL.