/**
* Return pointer to the named function. If the function name isn't found
* in the name of static functions, try generating a new API entrypoint on
* the fly with assembly language.
*/
_glapi_proc
_glapi_get_proc_address(const char *funcName)
{
_glapi_proc func;
struct _glapi_function * entry;
init_glapi_relocs_once();
#ifdef MANGLE
/* skip the prefix on the name */
if (funcName[1] != 'g' || funcName[2] != 'l')
return NULL;
#else
if (funcName[0] != 'g' || funcName[1] != 'l')
return NULL;
#endif
/* search extension functions first */
func = get_extension_proc_address(funcName);
if (func)
return func;
/* search static functions */
func = get_static_proc_address(funcName);
if (func)
return func;
/* generate entrypoint, dispatch offset must be filled in by the driver */
entry = add_function_name(funcName);
if (entry == NULL)
return NULL;
return entry->dispatch_stub;
}
/**
* Return pointer to the named function. If the function name isn't found
* in the name of static functions, try generating a new API entrypoint on
* the fly with assembly language.
*/
_glapi_proc
_glapi_get_proc_address(const char *funcName)
{
_glapi_proc func;
struct _glapi_function * entry;
init_glapi_relocs_once();
#ifdef USE_MGL_NAMESPACE
if (funcName && funcName[0] == 'm')
funcName++;
#endif
if (!funcName || funcName[0] != 'g' || funcName[1] != 'l')
return NULL;
/* search extension functions first */
func = get_extension_proc_address(funcName);
if (func)
return func;
/* search static functions */
func = get_static_proc_address(funcName);
if (func)
return func;
/* generate entrypoint, dispatch offset must be filled in by the driver */
entry = add_function_name(funcName);
if (entry == NULL)
return NULL;
return entry->dispatch_stub;
}
int
_glapi_add_dispatch( const char * const * function_names,
const char * parameter_signature )
{
static int next_dynamic_offset = FIRST_DYNAMIC_OFFSET;
const char * const real_sig = (parameter_signature != NULL)
? parameter_signature : "";
struct _glapi_function * entry[8];
GLboolean is_static[8];
unsigned i;
int offset = ~0;
init_glapi_relocs_once();
(void) memset( is_static, 0, sizeof( is_static ) );
(void) memset( entry, 0, sizeof( entry ) );
/* Find the _single_ dispatch offset for all function names that already
* exist (and have a dispatch offset).
*/
for ( i = 0 ; function_names[i] != NULL ; i++ ) {
const char * funcName = function_names[i];
int static_offset;
int extension_offset;
if (funcName[0] != 'g' || funcName[1] != 'l')
return -1;
/* search built-in functions */
static_offset = get_static_proc_offset(funcName);
if (static_offset >= 0) {
is_static[i] = GL_TRUE;
/* FIXME: Make sure the parameter signatures match! How do we get
* FIXME: the parameter signature for static functions?
*/
if ( (offset != ~0) && (static_offset != offset) ) {
return -1;
}
offset = static_offset;
continue;
}
/* search added extension functions */
entry[i] = get_extension_proc(funcName);
if (entry[i] != NULL) {
extension_offset = entry[i]->dispatch_offset;
/* The offset may be ~0 if the function name was added by
* glXGetProcAddress but never filled in by the driver.
*/
if (extension_offset == ~0) {
continue;
}
if (strcmp(real_sig, entry[i]->parameter_signature) != 0) {
return -1;
}
if ( (offset != ~0) && (extension_offset != offset) ) {
return -1;
}
offset = extension_offset;
}
}
/* If all function names are either new (or with no dispatch offset),
* allocate a new dispatch offset.
*/
if (offset == ~0) {
offset = next_dynamic_offset;
next_dynamic_offset++;
}
/* Fill in the dispatch offset for the new function names (and those with
* no dispatch offset).
*/
for ( i = 0 ; function_names[i] != NULL ; i++ ) {
if (is_static[i]) {
continue;
}
/* generate entrypoints for new function names */
if (entry[i] == NULL) {
entry[i] = add_function_name( function_names[i] );
if (entry[i] == NULL) {
/* FIXME: Possible memory leak here. */
return -1;
}
}
if (entry[i]->dispatch_offset == ~0) {
set_entry_info( entry[i], real_sig, offset );
}
}
return offset;
}
