-
/*
* Mesa 3-D graphics library
- * Version: 4.1
+ * Version: 6.3
*
- * Copyright (C) 1999-2002 Brian Paul All Rights Reserved.
+ * Copyright (C) 1999-2003 Brian Paul All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
/*
* Enable/disable printing of warning messages.
*/
-void
+PUBLIC void
_glapi_noop_enable_warnings(GLboolean enable)
{
WarnFlag = enable;
/*
* Register a callback function for reporting errors.
*/
-void
+PUBLIC void
_glapi_set_warning_func( _glapi_warning_func func )
{
warning_func = func;
#define F NULL
-#define DISPATCH(func, args, msg) \
- if (warn()) { \
- warning_func(NULL, "GL User Error: called without context:"); \
- warning_func msg; \
+#define DISPATCH(func, args, msg) \
+ if (warn()) { \
+ warning_func(NULL, "GL User Error: called without context: %s", #func); \
}
-#define RETURN_DISPATCH(func, args, msg) \
- if (warn()) { \
- warning_func(NULL, "GL User Error: called without context:"); \
- warning_func msg; \
- } \
+#define RETURN_DISPATCH(func, args, msg) \
+ if (warn()) { \
+ warning_func(NULL, "GL User Error: called without context: %s", #func); \
+ } \
return 0
#define DISPATCH_TABLE_NAME __glapi_noop_table
-#define UNUSED_TABLE_NAME __usused_noop_functions
+#define UNUSED_TABLE_NAME __unused_noop_functions
-#define TABLE_ENTRY(name) (void *) NoOp##name
+#define TABLE_ENTRY(name) (_glapi_proc) NoOp##name
-static int NoOpUnused(void)
+static GLint NoOpUnused(void)
{
if (warn()) {
warning_func(NULL, "GL User Error: calling extension function without a current context\n");
/***** BEGIN THREAD-SAFE DISPATCH *****/
-/* if we support thread-safety, build a special dispatch table for use
- * in thread-safety mode (ThreadSafe == GL_TRUE). Each entry in the
- * dispatch table will call _glthread_GetTSD() to get the actual dispatch
- * table bound to the current thread, then jump through that table.
- */
#if defined(THREADS)
-static GLboolean ThreadSafe = GL_FALSE; /* In thread-safe mode? */
-static _glthread_TSD DispatchTSD; /* Per-thread dispatch pointer */
-static _glthread_TSD RealDispatchTSD; /* only when using override */
-static _glthread_TSD ContextTSD; /* Per-thread context pointer */
+/**
+ * \name Multi-threaded control support variables
+ *
+ * If thread-safety is supported, there are two potential mechanisms that can
+ * be used. The old-style mechanism would set \c _glapi_Dispatch to a special
+ * thread-safe dispatch table. These dispatch routines would call
+ * \c _glapi_get_dispatch to get the actual dispatch pointer. In this
+ * setup \c _glapi_Dispatch could never be \c NULL. This dual layered
+ * dispatch setup performed great for single-threaded apps, but didn't
+ * perform well for multithreaded apps.
+ *
+ * In the new mechansim, there are two variables. The first is
+ * \c _glapi_DispatchTSD. In the single-threaded case, this variable points
+ * to the dispatch table. In the multi-threaded case, this variable is
+ * \c NULL, and thread-specific variable \c _gl_DispatchTSD points to the
+ * actual dispatch table. \c _glapi_DispatchTSD is used to signal to the
+ * static dispatch functions to call \c _glapi_get_dispatch to get the real
+ * dispatch table.
+ *
+ * There is a race condition in setting \c _glapi_DispatchTSD to \c NULL.
+ * It is possible for the original thread to be setting it at the same instant
+ * a new thread, perhaps running on a different processor, is clearing it.
+ * Because of that, \c ThreadSafe, which can only ever be changed to
+ * \c GL_TRUE, is used to determine whether or not the application is
+ * multithreaded.
+ */
+/*@{*/
+static GLboolean ThreadSafe = GL_FALSE; /**< In thread-safe mode? */
+_glthread_TSD _gl_DispatchTSD; /**< Per-thread dispatch pointer */
+static _glthread_TSD RealDispatchTSD; /**< only when using override */
+static _glthread_TSD ContextTSD; /**< Per-thread context pointer */
+/*@}*/
-#define KEYWORD1 static
-#define KEYWORD2 GLAPIENTRY
-#define NAME(func) _ts_##func
-
-#define DISPATCH(FUNC, ARGS, MESSAGE) \
- struct _glapi_table *dispatch; \
- dispatch = (struct _glapi_table *) _glthread_GetTSD(&DispatchTSD); \
- if (!dispatch) \
- dispatch = (struct _glapi_table *) __glapi_noop_table; \
- (dispatch->FUNC) ARGS
-
-#define RETURN_DISPATCH(FUNC, ARGS, MESSAGE) \
- struct _glapi_table *dispatch; \
- dispatch = (struct _glapi_table *) _glthread_GetTSD(&DispatchTSD); \
- if (!dispatch) \
- dispatch = (struct _glapi_table *) __glapi_noop_table; \
- return (dispatch->FUNC) ARGS
-
#define DISPATCH_TABLE_NAME __glapi_threadsafe_table
-#define UNUSED_TABLE_NAME __usused_threadsafe_functions
+#define UNUSED_TABLE_NAME __unused_threadsafe_functions
-#define TABLE_ENTRY(name) (void *) _ts_##name
+#define TABLE_ENTRY(name) (_glapi_proc) gl##name
-static int _ts_Unused(void)
+static GLint glUnused(void)
{
return 0;
}
-struct _glapi_table *_glapi_Dispatch = (struct _glapi_table *) __glapi_noop_table;
-struct _glapi_table *_glapi_RealDispatch = (struct _glapi_table *) __glapi_noop_table;
+PUBLIC struct _glapi_table *_glapi_Dispatch = (struct _glapi_table *) __glapi_noop_table;
+#if defined( THREADS )
+PUBLIC struct _glapi_table *_glapi_DispatchTSD = (struct _glapi_table *) __glapi_noop_table;
+#endif
+PUBLIC struct _glapi_table *_glapi_RealDispatch = (struct _glapi_table *) __glapi_noop_table;
+
/* Used when thread safety disabled */
-void *_glapi_Context = NULL;
+PUBLIC void *_glapi_Context = NULL;
static GLboolean DispatchOverride = GL_FALSE;
-/* strdup() is actually not a standard ANSI C or POSIX routine.
+/**
+ * strdup() is actually not a standard ANSI C or POSIX routine.
* Irix will not define it if ANSI mode is in effect.
*/
static char *
-/*
+/**
* We should call this periodically from a function such as glXMakeCurrent
* in order to test if multiple threads are being used.
*/
-void
+PUBLIC void
_glapi_check_multithread(void)
{
#if defined(THREADS)
}
else if (knownID != _glthread_GetID()) {
ThreadSafe = GL_TRUE;
+ _glapi_set_dispatch(NULL);
}
}
- if (ThreadSafe) {
+ else if (!_glapi_get_dispatch()) {
/* make sure that this thread's dispatch pointer isn't null */
- if (!_glapi_get_dispatch()) {
- _glapi_set_dispatch(NULL);
- }
+ _glapi_set_dispatch(NULL);
}
#endif
}
-/*
+/**
* Set the current context pointer for this thread.
* The context pointer is an opaque type which should be cast to
* void from the real context pointer type.
*/
-void
+PUBLIC void
_glapi_set_context(void *context)
{
+ (void) __unused_noop_functions; /* silence a warning */
#if defined(THREADS)
+ (void) __unused_threadsafe_functions; /* silence a warning */
_glthread_SetTSD(&ContextTSD, context);
- if (ThreadSafe)
- _glapi_Context = NULL;
- else
- _glapi_Context = context;
+ _glapi_Context = (ThreadSafe) ? NULL : context;
#else
_glapi_Context = context;
#endif
-/*
+/**
* Get the current context pointer for this thread.
* The context pointer is an opaque type which should be cast from
* void to the real context pointer type.
*/
-void *
+PUBLIC void *
_glapi_get_context(void)
{
#if defined(THREADS)
-/*
+/**
* Set the global or per-thread dispatch table pointer.
*/
-void
+PUBLIC void
_glapi_set_dispatch(struct _glapi_table *dispatch)
{
if (!dispatch) {
}
else {
/* normal operation */
- _glthread_SetTSD(&DispatchTSD, (void *) dispatch);
- if (ThreadSafe)
- _glapi_Dispatch = (struct _glapi_table *) __glapi_threadsafe_table;
- else
- _glapi_Dispatch = dispatch;
+ _glthread_SetTSD(&_gl_DispatchTSD, (void *) dispatch);
+ if (ThreadSafe) {
+ _glapi_Dispatch = (struct _glapi_table *) __glapi_threadsafe_table;
+ _glapi_DispatchTSD = NULL;
+ }
+ else {
+ _glapi_Dispatch = dispatch;
+ _glapi_DispatchTSD = dispatch;
+ }
}
#else /*THREADS*/
if (DispatchOverride) {
-/*
+/**
* Return pointer to current dispatch table for calling thread.
*/
-struct _glapi_table *
+PUBLIC struct _glapi_table *
_glapi_get_dispatch(void)
{
#if defined(THREADS)
return (struct _glapi_table *) _glthread_GetTSD(&RealDispatchTSD);
}
else {
- return (struct _glapi_table *) _glthread_GetTSD(&DispatchTSD);
+ return (struct _glapi_table *) _glthread_GetTSD(&_gl_DispatchTSD);
}
}
else {
return _glapi_RealDispatch;
}
else {
- assert(_glapi_Dispatch);
- return _glapi_Dispatch;
+ assert(_glapi_DispatchTSD);
+ return _glapi_DispatchTSD;
}
}
#else
/*
* Return: dispatch override layer number.
*/
-int
+PUBLIC int
_glapi_begin_dispatch_override(struct _glapi_table *override)
{
struct _glapi_table *real = _glapi_get_dispatch();
_glapi_set_dispatch(real);
#if defined(THREADS)
- _glthread_SetTSD(&DispatchTSD, (void *) override);
- if (ThreadSafe)
+ _glthread_SetTSD(&_gl_DispatchTSD, (void *) override);
+ if ( ThreadSafe ) {
_glapi_Dispatch = (struct _glapi_table *) __glapi_threadsafe_table;
- else
+ _glapi_DispatchTSD = NULL;
+ }
+ else {
_glapi_Dispatch = override;
+ _glapi_DispatchTSD = override;
+ }
#else
_glapi_Dispatch = override;
#endif
}
-void
+PUBLIC void
_glapi_end_dispatch_override(int layer)
{
struct _glapi_table *real = _glapi_get_dispatch();
}
-struct _glapi_table *
+PUBLIC struct _glapi_table *
_glapi_get_override_dispatch(int layer)
{
if (layer == 0) {
else {
if (DispatchOverride) {
#if defined(THREADS)
- return (struct _glapi_table *) _glthread_GetTSD(&DispatchTSD);
+ return (struct _glapi_table *) _glthread_GetTSD(&_gl_DispatchTSD);
#else
return _glapi_Dispatch;
#endif
}
-struct name_address_offset {
- const char *Name;
- GLvoid *Address;
- GLuint Offset;
-};
-
+#if !defined( USE_X86_ASM )
+#define NEED_FUNCTION_POINTER
+#endif
/* The code in this file is auto-generated with Python */
#include "glprocs.h"
+/**
+ * Search the table of static entrypoint functions for the named function
+ * and return the corresponding glprocs_table_t entry.
+ */
+static const glprocs_table_t *
+find_entry( const char * n )
+{
+ GLuint i;
+
+ for (i = 0; static_functions[i].Name_offset >= 0; i++) {
+ const char * test_name;
+
+ test_name = gl_string_table + static_functions[i].Name_offset;
+ if (strcmp(test_name, n) == 0) {
+ return & static_functions[i];
+ }
+ }
+ return NULL;
+}
+
-/*
+/**
* Return dispatch table offset of the named static (built-in) function.
* Return -1 if function not found.
*/
static GLint
get_static_proc_offset(const char *funcName)
{
- GLuint i;
- for (i = 0; static_functions[i].Name; i++) {
- if (strcmp(static_functions[i].Name, funcName) == 0) {
- return static_functions[i].Offset;
- }
+ const glprocs_table_t * const f = find_entry( funcName );
+
+ if ( f != NULL ) {
+ return f->Offset;
}
return -1;
}
-/*
+#ifdef USE_X86_ASM
+extern const GLubyte gl_dispatch_functions_start[];
+
+# if defined(THREADS)
+# define X86_DISPATCH_FUNCTION_SIZE 32
+# else
+# define X86_DISPATCH_FUNCTION_SIZE 16
+# endif
+
+
+/**
* Return dispatch function address the named static (built-in) function.
* Return NULL if function not found.
*/
-static GLvoid *
+static const _glapi_proc
+get_static_proc_address(const char *funcName)
+{
+ const glprocs_table_t * const f = find_entry( funcName );
+
+ if ( f != NULL ) {
+ return (_glapi_proc) (gl_dispatch_functions_start
+ + (X86_DISPATCH_FUNCTION_SIZE * f->Offset));
+ }
+ else {
+ return NULL;
+ }
+}
+
+#else
+
+
+/**
+ * Return pointer to the named static (built-in) function.
+ * \return NULL if function not found.
+ */
+static const _glapi_proc
get_static_proc_address(const char *funcName)
{
- GLint i;
- for (i = 0; static_functions[i].Name; i++) {
- if (strcmp(static_functions[i].Name, funcName) == 0) {
- return static_functions[i].Address;
+ const glprocs_table_t * const f = find_entry( funcName );
+ return ( f != NULL ) ? f->Address : NULL;
+}
+
+#endif /* USE_X86_ASM */
+
+
+/**
+ * Return the name of the function at the given offset in the dispatch
+ * table. For debugging only.
+ */
+static const char *
+get_static_proc_name( GLuint offset )
+{
+ GLuint i;
+
+ for (i = 0; static_functions[i].Name_offset >= 0; i++) {
+ if (static_functions[i].Offset == offset) {
+ return gl_string_table + static_functions[i].Name_offset;
}
}
return NULL;
/*
- * The disptach table size (number of entries) is the sizeof the
+ * 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)
+struct name_address_offset {
+ const char *Name;
+ _glapi_proc Address;
+ GLuint Offset;
+};
+
+
static struct name_address_offset ExtEntryTable[MAX_EXTENSION_FUNCS];
static GLuint NumExtEntryPoints = 0;
extern void __glapi_sparc_icache_flush(unsigned int *);
#endif
-/*
+/**
* 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 void *
+static _glapi_proc
generate_entrypoint(GLuint functionOffset)
{
#if defined(USE_X86_ASM)
if (code) {
memcpy(code, insn_template, sizeof(insn_template));
+#if defined( THREADS )
+ *(unsigned int *)(code + 0x01) = (unsigned int)&_glapi_DispatchTSD;
+#else
*(unsigned int *)(code + 0x01) = (unsigned int)&_glapi_Dispatch;
+#endif
*(unsigned int *)(code + 0x0b) = (unsigned int)functionOffset * 4;
next_insn = (unsigned int)(code + 0x14);
*(unsigned int *)(code + 0x10) = (unsigned int)_glapi_get_dispatch - next_insn;
*(unsigned int *)(code + 0x16) = (unsigned int)functionOffset * 4;
}
- return code;
+ return (_glapi_proc) code;
#elif defined(USE_SPARC_ASM)
-#if defined(__sparc_v9__) && !defined(__linux__)
+#if (defined(__sparc_v9__) && (!defined(__linux__) || defined(__linux_sparc_64__)))
static const unsigned int insn_template[] = {
0x05000000, /* sethi %uhi(_glapi_Dispatch), %g2 */
0x03000000, /* sethi %hi(_glapi_Dispatch), %g1 */
if (code) {
memcpy(code, insn_template, sizeof(insn_template));
-#if defined(__sparc_v9__) && !defined(__linux__)
+#if (defined(__sparc_v9__) && (!defined(__linux__) || defined(__linux_sparc_64__)))
code[0] |= (glapi_addr >> (32 + 10));
code[1] |= ((glapi_addr & 0xffffffff) >> 10);
__glapi_sparc_icache_flush(&code[0]);
__glapi_sparc_icache_flush(&code[2]);
#endif
}
- return code;
+ return (_glapi_proc) code;
#else
+ (void) functionOffset;
return NULL;
#endif /* USE_*_ASM */
}
-/*
+/**
* 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(void *entrypoint, GLuint offset)
+fill_in_entrypoint_offset(_glapi_proc entrypoint, GLuint offset)
{
#if defined(USE_X86_ASM)
/* XXX this hasn't been tested! */
unsigned int *code = (unsigned int *) entrypoint;
-#if defined(__sparc_v9__) && !defined(__linux__)
+#if (defined(__sparc_v9__) && (!defined(__linux__) || defined(__linux_sparc_64__)))
code[6] = 0x05000000; /* sethi %hi(8 * glapioffset), %g2 */
code[7] = 0x8410a000; /* or %g2, %lo(8 * glapioffset), %g2 */
code[6] |= ((offset * 8) >> 10);
__glapi_sparc_icache_flush(&code[2]);
#endif /* __sparc_v9__ && !linux */
+#else
+
+ /* an unimplemented architecture */
+ (void) entrypoint;
+ (void) offset;
+
#endif /* USE_*_ASM */
}
-/*
+/**
* Add a new extension function entrypoint.
* Return: GL_TRUE = success or GL_FALSE = failure
*/
-GLboolean
+PUBLIC GLboolean
_glapi_add_entrypoint(const char *funcName, GLuint offset)
{
/* trivial rejection test */
#ifdef MANGLE
if (!funcName || funcName[0] != 'm' || funcName[1] != 'g' || funcName[2] != 'l')
- return NULL;
+ return GL_FALSE;
#else
if (!funcName || funcName[0] != 'g' || funcName[1] != 'l')
return GL_FALSE;
return GL_FALSE;
}
else {
- void *entrypoint = generate_entrypoint(offset);
+ _glapi_proc entrypoint = generate_entrypoint(offset);
if (!entrypoint)
return GL_FALSE; /* couldn't generate assembly */
}
-/*
+/**
* Return offset of entrypoint for named function within dispatch table.
*/
-GLint
+PUBLIC GLint
_glapi_get_proc_offset(const char *funcName)
{
/* search extension functions first */
-/*
- * Return entrypoint for named function.
+/**
+ * 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.
*/
-const GLvoid *
+PUBLIC const _glapi_proc
_glapi_get_proc_address(const char *funcName)
{
GLuint i;
/* search static functions */
{
- const GLvoid *func = get_static_proc_address(funcName);
+ const _glapi_proc func = get_static_proc_address(funcName);
if (func)
return func;
}
* when you try calling a GL function that doesn't really exist.
*/
if (NumExtEntryPoints < MAX_EXTENSION_FUNCS) {
- GLvoid *entrypoint = generate_entrypoint(~0);
+ _glapi_proc entrypoint = generate_entrypoint(~0);
if (!entrypoint)
return GL_FALSE;
-/*
+/**
* Return the name of the function at the given dispatch offset.
* This is only intended for debugging.
*/
-const char *
+PUBLIC const char *
_glapi_get_proc_name(GLuint offset)
{
- const GLuint n = sizeof(static_functions) / sizeof(struct name_address_offset);
GLuint i;
+ const char * n;
/* search built-in functions */
- for (i = 0; i < n; i++) {
- if (static_functions[i].Offset == offset)
- return static_functions[i].Name;
+ n = get_static_proc_name(offset);
+ if ( n != NULL ) {
+ return n;
}
/* search added extension functions */
-/*
+/**
* Return size of dispatch table struct as number of functions (or
* slots).
*/
-GLuint
+PUBLIC GLuint
_glapi_get_dispatch_table_size(void)
{
return DISPATCH_TABLE_SIZE;
-/*
+/**
* Get API dispatcher version string.
*/
-const char *
+PUBLIC const char *
_glapi_get_version(void)
{
return "20021001"; /* YYYYMMDD */
-/*
+/**
* Make sure there are no NULL pointers in the given dispatch table.
* Intended for debugging purposes.
*/
-void
+PUBLIC void
_glapi_check_table(const struct _glapi_table *table)
{
#ifdef DEBUG
GLuint offset = (secondaryColor3fFunc - (char *) table) / sizeof(void *);
assert(secondaryColor3fOffset == _gloffset_SecondaryColor3fEXT);
assert(secondaryColor3fOffset == offset);
- assert(_glapi_get_proc_address("glSecondaryColor3fEXT") == (void *) &glSecondaryColor3fEXT);
+ assert(_glapi_get_proc_address("glSecondaryColor3fEXT") == (_glapi_proc) &glSecondaryColor3fEXT);
}
{
GLuint pointParameterivOffset = _glapi_get_proc_offset("glPointParameterivNV");
GLuint offset = (pointParameterivFunc - (char *) table) / sizeof(void *);
assert(pointParameterivOffset == _gloffset_PointParameterivNV);
assert(pointParameterivOffset == offset);
- assert(_glapi_get_proc_address("glPointParameterivNV") == (void *) &glPointParameterivNV);
+ assert(_glapi_get_proc_address("glPointParameterivNV") == (_glapi_proc) &glPointParameterivNV);
}
{
GLuint setFenceOffset = _glapi_get_proc_offset("glSetFenceNV");
GLuint offset = (setFenceFunc - (char *) table) / sizeof(void *);
assert(setFenceOffset == _gloffset_SetFenceNV);
assert(setFenceOffset == offset);
- assert(_glapi_get_proc_address("glSetFenceNV") == (void *) &glSetFenceNV);
+ assert(_glapi_get_proc_address("glSetFenceNV") == (_glapi_proc) &glSetFenceNV);
}
+#else
+ (void) table;
#endif
}
projects / mesa.git / blobdiff