diff options
Diffstat (limited to 'src/mesa/glapi/glapi_getproc.c')
| -rw-r--r-- | src/mesa/glapi/glapi_getproc.c | 641 |
1 files changed, 250 insertions, 391 deletions
diff --git a/src/mesa/glapi/glapi_getproc.c b/src/mesa/glapi/glapi_getproc.c index a6dbf173e82..c73e8dd3b04 100644 --- a/src/mesa/glapi/glapi_getproc.c +++ b/src/mesa/glapi/glapi_getproc.c @@ -39,25 +39,19 @@ #endif #include "glapi/glapi.h" -#include "glapi/glapioffsets.h" +#include "glapi/glapi_priv.h" #include "glapi/glapitable.h" +#include "glapi/glapioffsets.h" -#if defined(USE_X64_64_ASM) && defined(GLX_USE_TLS) -# define DISPATCH_FUNCTION_SIZE 16 -#elif defined(USE_X86_ASM) -# if defined(THREADS) && !defined(GLX_USE_TLS) -# define DISPATCH_FUNCTION_SIZE 32 -# else -# define DISPATCH_FUNCTION_SIZE 16 -# endif -#endif +/********************************************************************** + * Static function management. + */ + -#if !defined(DISPATCH_FUNCTION_SIZE) && !defined(XFree86Server) && !defined(XGLServer) +#if !defined(DISPATCH_FUNCTION_SIZE) && !defined(XFree86Server) # define NEED_FUNCTION_POINTER #endif - -/* The code in this file is auto-generated with Python */ #include "glapi/glprocs.h" @@ -66,13 +60,13 @@ * and return the corresponding glprocs_table_t entry. */ static const glprocs_table_t * -find_entry( const char * n ) +get_static_proc( const char * n ) { GLuint i; for (i = 0; static_functions[i].Name_offset >= 0; i++) { const char *testName = gl_string_table + static_functions[i].Name_offset; #ifdef MANGLE - /* skip the "m" prefix on the name */ + /* skip the prefix on the name */ if (strcmp(testName, n + 1) == 0) #else if (strcmp(testName, n) == 0) @@ -92,27 +86,16 @@ find_entry( const char * n ) static GLint get_static_proc_offset(const char *funcName) { - const glprocs_table_t * const f = find_entry( funcName ); - if (f) { - return f->Offset; + const glprocs_table_t * const f = get_static_proc( funcName ); + if (f == NULL) { + return -1; } - return -1; -} - -#ifdef USE_X86_ASM - -#if defined( GLX_USE_TLS ) -extern GLubyte gl_dispatch_functions_start[]; -extern GLubyte gl_dispatch_functions_end[]; -#else -extern const GLubyte gl_dispatch_functions_start[]; -#endif - -#endif /* USE_X86_ASM */ + return f->Offset; +} -#if !defined(XFree86Server) && !defined(XGLServer) +#if !defined(XFree86Server) /** * Return dispatch function address for the named static (built-in) function. @@ -121,27 +104,32 @@ extern const GLubyte gl_dispatch_functions_start[]; static _glapi_proc get_static_proc_address(const char *funcName) { - const glprocs_table_t * const f = find_entry( funcName ); - if (f) { + const glprocs_table_t * const f = get_static_proc( funcName ); + if (f == NULL) { + return NULL; + } + #if defined(DISPATCH_FUNCTION_SIZE) && defined(GLX_INDIRECT_RENDERING) - return (f->Address == NULL) - ? (_glapi_proc) (gl_dispatch_functions_start - + (DISPATCH_FUNCTION_SIZE * f->Offset)) - : f->Address; + return (f->Address == NULL) + ? get_entrypoint_address(f->Offset) + : f->Address; #elif defined(DISPATCH_FUNCTION_SIZE) - return (_glapi_proc) (gl_dispatch_functions_start - + (DISPATCH_FUNCTION_SIZE * f->Offset)); + return get_entrypoint_address(f->Offset); #else - return f->Address; + return f->Address; #endif - } - else { - return NULL; - } } -#endif /* !defined(XFree86Server) && !defined(XGLServer) */ +#else + +static _glapi_proc +get_static_proc_address(const char *funcName) +{ + (void) funcName; + return NULL; +} +#endif /* !defined(XFree86Server) */ /** @@ -162,172 +150,6 @@ get_static_proc_name( GLuint offset ) -#if defined(PTHREADS) || defined(GLX_USE_TLS) - -/** - * Perform platform-specific GL API entry-point fixups. - */ -static void -init_glapi_relocs( void ) -{ -#if defined(USE_X86_ASM) && defined(GLX_USE_TLS) && !defined(GLX_X86_READONLY_TEXT) - extern unsigned long _x86_get_dispatch(void); - char run_time_patch[] = { - 0x65, 0xa1, 0, 0, 0, 0 /* movl %gs:0,%eax */ - }; - GLuint *offset = (GLuint *) &run_time_patch[2]; /* 32-bits for x86/32 */ - const GLubyte * const get_disp = (const GLubyte *) run_time_patch; - GLubyte * curr_func = (GLubyte *) gl_dispatch_functions_start; - - *offset = _x86_get_dispatch(); - while ( curr_func != (GLubyte *) gl_dispatch_functions_end ) { - (void) memcpy( curr_func, get_disp, sizeof(run_time_patch)); - curr_func += DISPATCH_FUNCTION_SIZE; - } -#endif -#ifdef USE_SPARC_ASM - extern void __glapi_sparc_icache_flush(unsigned int *); - static const unsigned int template[] = { -#ifdef GLX_USE_TLS - 0x05000000, /* sethi %hi(_glapi_tls_Dispatch), %g2 */ - 0x8730e00a, /* srl %g3, 10, %g3 */ - 0x8410a000, /* or %g2, %lo(_glapi_tls_Dispatch), %g2 */ -#ifdef __arch64__ - 0xc259c002, /* ldx [%g7 + %g2], %g1 */ - 0xc2584003, /* ldx [%g1 + %g3], %g1 */ -#else - 0xc201c002, /* ld [%g7 + %g2], %g1 */ - 0xc2004003, /* ld [%g1 + %g3], %g1 */ -#endif - 0x81c04000, /* jmp %g1 */ - 0x01000000, /* nop */ -#else -#ifdef __arch64__ - 0x03000000, /* 64-bit 0x00 --> sethi %hh(_glapi_Dispatch), %g1 */ - 0x05000000, /* 64-bit 0x04 --> sethi %lm(_glapi_Dispatch), %g2 */ - 0x82106000, /* 64-bit 0x08 --> or %g1, %hm(_glapi_Dispatch), %g1 */ - 0x8730e00a, /* 64-bit 0x0c --> srl %g3, 10, %g3 */ - 0x83287020, /* 64-bit 0x10 --> sllx %g1, 32, %g1 */ - 0x82004002, /* 64-bit 0x14 --> add %g1, %g2, %g1 */ - 0xc2586000, /* 64-bit 0x18 --> ldx [%g1 + %lo(_glapi_Dispatch)], %g1 */ -#else - 0x03000000, /* 32-bit 0x00 --> sethi %hi(_glapi_Dispatch), %g1 */ - 0x8730e00a, /* 32-bit 0x04 --> srl %g3, 10, %g3 */ - 0xc2006000, /* 32-bit 0x08 --> ld [%g1 + %lo(_glapi_Dispatch)], %g1 */ -#endif - 0x80a06000, /* --> cmp %g1, 0 */ - 0x02800005, /* --> be +4*5 */ - 0x01000000, /* --> nop */ -#ifdef __arch64__ - 0xc2584003, /* 64-bit --> ldx [%g1 + %g3], %g1 */ -#else - 0xc2004003, /* 32-bit --> ld [%g1 + %g3], %g1 */ -#endif - 0x81c04000, /* --> jmp %g1 */ - 0x01000000, /* --> nop */ -#ifdef __arch64__ - 0x9de3bf80, /* 64-bit --> save %sp, -128, %sp */ -#else - 0x9de3bfc0, /* 32-bit --> save %sp, -64, %sp */ -#endif - 0xa0100003, /* --> mov %g3, %l0 */ - 0x40000000, /* --> call _glapi_get_dispatch */ - 0x01000000, /* --> nop */ - 0x82100008, /* --> mov %o0, %g1 */ - 0x86100010, /* --> mov %l0, %g3 */ - 0x10bffff7, /* --> ba -4*9 */ - 0x81e80000, /* --> restore */ -#endif - }; -#ifdef GLX_USE_TLS - extern unsigned int __glapi_sparc_tls_stub; - extern unsigned long __glapi_sparc_get_dispatch(void); - unsigned int *code = &__glapi_sparc_tls_stub; - unsigned long dispatch = __glapi_sparc_get_dispatch(); -#else - extern unsigned int __glapi_sparc_pthread_stub; - unsigned int *code = &__glapi_sparc_pthread_stub; - unsigned long dispatch = (unsigned long) &_glapi_Dispatch; - unsigned long call_dest = (unsigned long ) &_glapi_get_dispatch; - int idx; -#endif - -#if defined(GLX_USE_TLS) - code[0] = template[0] | (dispatch >> 10); - code[1] = template[1]; - __glapi_sparc_icache_flush(&code[0]); - code[2] = template[2] | (dispatch & 0x3ff); - code[3] = template[3]; - __glapi_sparc_icache_flush(&code[2]); - code[4] = template[4]; - code[5] = template[5]; - __glapi_sparc_icache_flush(&code[4]); - code[6] = template[6]; - __glapi_sparc_icache_flush(&code[6]); -#else -#if defined(__arch64__) - code[0] = template[0] | (dispatch >> (32 + 10)); - code[1] = template[1] | ((dispatch & 0xffffffff) >> 10); - __glapi_sparc_icache_flush(&code[0]); - code[2] = template[2] | ((dispatch >> 32) & 0x3ff); - code[3] = template[3]; - __glapi_sparc_icache_flush(&code[2]); - code[4] = template[4]; - code[5] = template[5]; - __glapi_sparc_icache_flush(&code[4]); - code[6] = template[6] | (dispatch & 0x3ff); - idx = 7; -#else - code[0] = template[0] | (dispatch >> 10); - code[1] = template[1]; - __glapi_sparc_icache_flush(&code[0]); - code[2] = template[2] | (dispatch & 0x3ff); - idx = 3; -#endif - code[idx + 0] = template[idx + 0]; - __glapi_sparc_icache_flush(&code[idx - 1]); - code[idx + 1] = template[idx + 1]; - code[idx + 2] = template[idx + 2]; - __glapi_sparc_icache_flush(&code[idx + 1]); - code[idx + 3] = template[idx + 3]; - code[idx + 4] = template[idx + 4]; - __glapi_sparc_icache_flush(&code[idx + 3]); - code[idx + 5] = template[idx + 5]; - code[idx + 6] = template[idx + 6]; - __glapi_sparc_icache_flush(&code[idx + 5]); - code[idx + 7] = template[idx + 7]; - code[idx + 8] = template[idx + 8] | - (((call_dest - ((unsigned long) &code[idx + 8])) - >> 2) & 0x3fffffff); - __glapi_sparc_icache_flush(&code[idx + 7]); - code[idx + 9] = template[idx + 9]; - code[idx + 10] = template[idx + 10]; - __glapi_sparc_icache_flush(&code[idx + 9]); - code[idx + 11] = template[idx + 11]; - code[idx + 12] = template[idx + 12]; - __glapi_sparc_icache_flush(&code[idx + 11]); - code[idx + 13] = template[idx + 13]; - __glapi_sparc_icache_flush(&code[idx + 13]); -#endif -#endif -} - -void -init_glapi_relocs_once( void ) -{ - static pthread_once_t once_control = PTHREAD_ONCE_INIT; - pthread_once( & once_control, init_glapi_relocs ); -} - -#else - -void -init_glapi_relocs_once( void ) { } - -#endif /* defined(PTHREADS) || defined(GLX_USE_TLS) */ - - - /********************************************************************** * Extension function management. */ @@ -381,107 +203,54 @@ struct _glapi_function { static struct _glapi_function ExtEntryTable[MAX_EXTENSION_FUNCS]; static GLuint NumExtEntryPoints = 0; -#ifdef USE_SPARC_ASM -extern void __glapi_sparc_icache_flush(unsigned int *); -#endif - -static void -fill_in_entrypoint_offset(_glapi_proc entrypoint, GLuint offset); -/** - * Generate a dispatch function (entrypoint) which jumps through - * the given slot number (offset) in the current dispatch table. - * We need assembly language in order to accomplish this. - */ -static _glapi_proc -generate_entrypoint(GLuint functionOffset) +static struct _glapi_function * +get_extension_proc(const char *funcName) { -#if defined(USE_X86_ASM) - /* 32 is chosen as something of a magic offset. For x86, the dispatch - * at offset 32 is the first one where the offset in the - * "jmp OFFSET*4(%eax)" can't be encoded in a single byte. - */ - const GLubyte * const template_func = gl_dispatch_functions_start - + (DISPATCH_FUNCTION_SIZE * 32); - GLubyte * const code = (GLubyte *) malloc(DISPATCH_FUNCTION_SIZE); - - - if ( code != NULL ) { - (void) memcpy(code, template_func, DISPATCH_FUNCTION_SIZE); - fill_in_entrypoint_offset( (_glapi_proc) code, functionOffset ); + GLuint i; + for (i = 0; i < NumExtEntryPoints; i++) { + if (strcmp(ExtEntryTable[i].name, funcName) == 0) { + return & ExtEntryTable[i]; + } } + return NULL; +} - return (_glapi_proc) code; -#elif defined(USE_SPARC_ASM) - -#if defined(PTHREADS) || defined(GLX_USE_TLS) - static const unsigned int template[] = { - 0x07000000, /* sethi %hi(0), %g3 */ - 0x8210000f, /* mov %o7, %g1 */ - 0x40000000, /* call */ - 0x9e100001, /* mov %g1, %o7 */ - }; -#ifdef GLX_USE_TLS - extern unsigned int __glapi_sparc_tls_stub; - unsigned long call_dest = (unsigned long ) &__glapi_sparc_tls_stub; -#else - extern unsigned int __glapi_sparc_pthread_stub; - unsigned long call_dest = (unsigned long ) &__glapi_sparc_pthread_stub; -#endif - unsigned int *code = (unsigned int *) malloc(sizeof(template)); - if (code) { - code[0] = template[0] | (functionOffset & 0x3fffff); - code[1] = template[1]; - __glapi_sparc_icache_flush(&code[0]); - code[2] = template[2] | - (((call_dest - ((unsigned long) &code[2])) - >> 2) & 0x3fffffff); - code[3] = template[3]; - __glapi_sparc_icache_flush(&code[2]); + +static GLint +get_extension_proc_offset(const char *funcName) +{ + const struct _glapi_function * const f = get_extension_proc( funcName ); + if (f == NULL) { + return -1; } - return (_glapi_proc) code; -#endif -#else - (void) functionOffset; - return NULL; -#endif /* USE_*_ASM */ + return f->dispatch_offset; } -/** - * This function inserts a new dispatch offset into the assembly language - * stub that was generated with the preceeding function. - */ -static void -fill_in_entrypoint_offset(_glapi_proc entrypoint, GLuint offset) +static _glapi_proc +get_extension_proc_address(const char *funcName) { -#if defined(USE_X86_ASM) - GLubyte * const code = (GLubyte *) entrypoint; - -#if DISPATCH_FUNCTION_SIZE == 32 - *((unsigned int *)(code + 11)) = 4 * offset; - *((unsigned int *)(code + 22)) = 4 * offset; -#elif DISPATCH_FUNCTION_SIZE == 16 && defined( GLX_USE_TLS ) - *((unsigned int *)(code + 8)) = 4 * offset; -#elif DISPATCH_FUNCTION_SIZE == 16 - *((unsigned int *)(code + 7)) = 4 * offset; -#else -# error Invalid DISPATCH_FUNCTION_SIZE! -#endif + const struct _glapi_function * const f = get_extension_proc( funcName ); + if (f == NULL) { + return NULL; + } -#elif defined(USE_SPARC_ASM) - unsigned int *code = (unsigned int *) entrypoint; - code[0] &= ~0x3fffff; - code[0] |= (offset * sizeof(void *)) & 0x3fffff; - __glapi_sparc_icache_flush(&code[0]); -#else + return f->dispatch_stub; +} - /* an unimplemented architecture */ - (void) entrypoint; - (void) offset; -#endif /* USE_*_ASM */ +static const char * +get_extension_proc_name(GLuint offset) +{ + GLuint i; + for (i = 0; i < NumExtEntryPoints; i++) { + if (ExtEntryTable[i].dispatch_offset == offset) { + return ExtEntryTable[i].name; + } + } + return NULL; } @@ -518,20 +287,55 @@ static struct _glapi_function * add_function_name( const char * funcName ) { struct _glapi_function * entry = NULL; - - if (NumExtEntryPoints < MAX_EXTENSION_FUNCS) { - _glapi_proc entrypoint = generate_entrypoint(~0); - if (entrypoint != NULL) { - entry = & ExtEntryTable[NumExtEntryPoints]; - - ExtEntryTable[NumExtEntryPoints].name = str_dup(funcName); - ExtEntryTable[NumExtEntryPoints].parameter_signature = NULL; - ExtEntryTable[NumExtEntryPoints].dispatch_offset = ~0; - ExtEntryTable[NumExtEntryPoints].dispatch_stub = entrypoint; - NumExtEntryPoints++; - } + _glapi_proc entrypoint = NULL; + char * name_dup = NULL; + + if (NumExtEntryPoints >= MAX_EXTENSION_FUNCS) + return NULL; + + if (funcName == NULL) + return NULL; + + name_dup = str_dup(funcName); + if (name_dup == NULL) + return NULL; + + entrypoint = generate_entrypoint(~0); + + if (entrypoint == NULL) { + free(name_dup); + return NULL; } + entry = & ExtEntryTable[NumExtEntryPoints]; + NumExtEntryPoints++; + + entry->name = name_dup; + entry->parameter_signature = NULL; + entry->dispatch_offset = ~0; + entry->dispatch_stub = entrypoint; + + return entry; +} + + +static struct _glapi_function * +set_entry_info( struct _glapi_function * entry, const char * signature, unsigned offset ) +{ + char * sig_dup = NULL; + + if (signature == NULL) + return NULL; + + sig_dup = str_dup(signature); + if (sig_dup == NULL) + return NULL; + + fill_in_entrypoint_offset(entry->dispatch_stub, offset); + + entry->parameter_signature = sig_dup; + entry->dispatch_offset = offset; + return entry; } @@ -593,88 +397,103 @@ _glapi_add_dispatch( const char * const * function_names, struct _glapi_function * entry[8]; GLboolean is_static[8]; unsigned i; - unsigned j; int offset = ~0; - int new_offset; + 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++ ) { - /* Do some trivial validation on the name of the function. - */ + const char * funcName = function_names[i]; + int static_offset; + int extension_offset; - if (!function_names[i] || function_names[i][0] != 'g' || function_names[i][1] != 'l') + if (funcName[0] != 'g' || funcName[1] != 'l') return -1; - - /* 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) { + + /* 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) && (new_offset != offset) ) { + if ( (offset != ~0) && (static_offset != offset) ) { return -1; } - is_static[i] = GL_TRUE; - offset = new_offset; + offset = static_offset; + + continue; } - - - 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; + + /* 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] ) { + 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) { - entry[i] = add_function_name( function_names[i] ); - if (entry[i] == NULL) { - /* FIXME: Possible memory leak here. - */ - return -1; - } + /* FIXME: Possible memory leak here. */ + return -1; } + } - entry[i]->parameter_signature = str_dup(real_sig); - fill_in_entrypoint_offset(entry[i]->dispatch_stub, offset); - entry[i]->dispatch_offset = offset; + if (entry[i]->dispatch_offset == ~0) { + set_entry_info( entry[i], real_sig, offset ); } } - + return offset; } @@ -685,13 +504,13 @@ _glapi_add_dispatch( const char * const * function_names, PUBLIC GLint _glapi_get_proc_offset(const char *funcName) { + GLint offset; + /* search extension functions first */ - GLuint i; - for (i = 0; i < NumExtEntryPoints; i++) { - if (strcmp(ExtEntryTable[i].name, funcName) == 0) { - return ExtEntryTable[i].dispatch_offset; - } - } + offset = get_extension_proc_offset(funcName); + if (offset >= 0) + return offset; + /* search static functions */ return get_static_proc_offset(funcName); } @@ -706,11 +525,14 @@ _glapi_get_proc_offset(const char *funcName) PUBLIC _glapi_proc _glapi_get_proc_address(const char *funcName) { + _glapi_proc func; struct _glapi_function * entry; - GLuint i; + + init_glapi_relocs_once(); #ifdef MANGLE - if (funcName[0] != 'm' || funcName[1] != 'g' || funcName[2] != 'l') + /* skip the prefix on the name */ + if (funcName[1] != 'g' || funcName[2] != 'l') return NULL; #else if (funcName[0] != 'g' || funcName[1] != 'l') @@ -718,23 +540,21 @@ _glapi_get_proc_address(const char *funcName) #endif /* search extension functions first */ - for (i = 0; i < NumExtEntryPoints; i++) { - if (strcmp(ExtEntryTable[i].name, funcName) == 0) { - return ExtEntryTable[i].dispatch_stub; - } - } + func = get_extension_proc_address(funcName); + if (func) + return func; -#if !defined( XFree86Server ) && !defined( XGLServer ) /* search static functions */ - { - const _glapi_proc func = get_static_proc_address(funcName); - if (func) - return func; - } -#endif /* !defined( XFree86Server ) */ + 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); - return (entry == NULL) ? NULL : entry->dispatch_stub; + if (entry == NULL) + return NULL; + + return entry->dispatch_stub; } @@ -746,7 +566,6 @@ _glapi_get_proc_address(const char *funcName) const char * _glapi_get_proc_name(GLuint offset) { - GLuint i; const char * n; /* search built-in functions */ @@ -756,16 +575,56 @@ _glapi_get_proc_name(GLuint offset) } /* search added extension functions */ - for (i = 0; i < NumExtEntryPoints; i++) { - if (ExtEntryTable[i].dispatch_offset == offset) { - return ExtEntryTable[i].name; - } - } - return NULL; + return get_extension_proc_name(offset); } +/********************************************************************** + * GL API table functions. + */ + + +/* + * The dispatch table size (number of entries) is the size of the + * _glapi_table struct plus the number of dynamic entries we can add. + * The extra slots can be filled in by DRI drivers that register new extension + * functions. + */ +#define DISPATCH_TABLE_SIZE (sizeof(struct _glapi_table) / sizeof(void *) + MAX_EXTENSION_FUNCS) + + +/** + * Return size of dispatch table struct as number of functions (or + * slots). + */ +PUBLIC GLuint +_glapi_get_dispatch_table_size(void) +{ + return DISPATCH_TABLE_SIZE; +} + + +/** + * Make sure there are no NULL pointers in the given dispatch table. + * Intended for debugging purposes. + */ +void +_glapi_check_table_not_null(const struct _glapi_table *table) +{ +#ifdef EXTRA_DEBUG /* set to DEBUG for extra DEBUG */ + const GLuint entries = _glapi_get_dispatch_table_size(); + const void **tab = (const void **) table; + GLuint i; + for (i = 1; i < entries; i++) { + assert(tab[i]); + } +#else + (void) table; +#endif +} + + /** * Do some spot checks to be sure that the dispatch table * slots are assigned correctly. For debugging only. @@ -773,7 +632,7 @@ _glapi_get_proc_name(GLuint offset) void _glapi_check_table(const struct _glapi_table *table) { -#if 0 /* enable this for extra DEBUG */ +#ifdef EXTRA_DEBUG /* set to DEBUG for extra DEBUG */ { GLuint BeginOffset = _glapi_get_proc_offset("glBegin"); char *BeginFunc = (char*) &table->Begin; |