/**
* Return offset of entrypoint for named function within dispatch table.
*/
GLint
_glapi_get_proc_offset(const char *funcName)
{
GLint offset;
/* search extension functions first */
offset = get_extension_proc_offset(funcName);
if (offset >= 0)
return offset;
/* search static functions */
return get_static_proc_offset(funcName);
}
/**
* Return offset of entrypoint for named function within dispatch table.
*/
PUBLIC GLint
_glapi_get_proc_offset(const char *funcName)
{
/* search extension functions first */
GLuint i;
for (i = 0; i < NumExtEntryPoints; i++) {
if (strcmp(ExtEntryTable[i].name, funcName) == 0) {
return ExtEntryTable[i].dispatch_offset;
}
}
/* search static functions */
return get_static_proc_offset(funcName);
}
PUBLIC 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;
unsigned j;
int offset = ~0;
int new_offset;
(void) memset(is_static, 0, sizeof(is_static));
(void) memset(entry, 0, sizeof(entry));
for (i = 0; function_names[i] != NULL; i++) {
/* Do some trivial validation on the name of the function. */
if (function_names[i][0] != 'g' || function_names[i][1] != 'l')
return GL_FALSE;
/* Determine if the named function already exists. If the function does
* exist, it must have the same parameter signature as the function
* being added.
*/
new_offset = get_static_proc_offset(function_names[i]);
if (new_offset >= 0) {
/* FIXME: Make sure the parameter signatures match! How do we get
* FIXME: the parameter signature for static functions?
*/
if ((offset != ~0) && (new_offset != offset)) {
return -1;
}
is_static[i] = GL_TRUE;
offset = new_offset;
}
for (j = 0; j < NumExtEntryPoints; j++) {
if (strcmp(ExtEntryTable[j].name, function_names[i]) == 0) {
/* The offset may be ~0 if the function name was added by
* glXGetProcAddress but never filled in by the driver.
*/
if (ExtEntryTable[j].dispatch_offset != ~0) {
if (strcmp(real_sig, ExtEntryTable[j].parameter_signature)
!= 0)
return -1;
if ((offset != ~0) &&
(ExtEntryTable[j].dispatch_offset != offset)) {
return -1;
}
offset = ExtEntryTable[j].dispatch_offset;
}
entry[i] = &ExtEntryTable[j];
break;
}
}
}
if (offset == ~0) {
offset = next_dynamic_offset;
next_dynamic_offset++;
}
for (i = 0; function_names[i] != NULL; i++) {
if (!is_static[i]) {
if (entry[i] == NULL) {
entry[i] = add_function_name(function_names[i]);
if (entry[i] == NULL)
return -1;
}
entry[i]->parameter_signature = strdup(real_sig);
entry[i]->dispatch_offset = offset;
}
}
return offset;
}
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;
}
