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added dispatch override mechanism, used by trace extension

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This commit is contained in:
Brian Paul
2001-01-23 23:35:47 +00:00
parent f2718b0966
commit ab0c886a6c
2 changed files with 122 additions and 56 deletions
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152
src/mesa/glapi/glapi.c
View File

@@ -1,10 +1,10 @@
/* $Id: glapi.c,v 1.48 2000/11/22 07:32:17 joukj Exp $ */
/* $Id: glapi.c,v 1.49 2001/01/23 23:35:47 brianp Exp $ */
/*
* Mesa 3-D graphics library
* Version: 3.5
*
* Copyright (C) 1999-2000 Brian Paul All Rights Reserved.
* Copyright (C) 1999-2001 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"),
@@ -38,6 +38,10 @@
* based libGL.so, and perhaps the SGI SI.
*
* There are no dependencies on Mesa in this code.
*
* Versions (API changes):
* 2000/02/23 - original version for Mesa 3.3 and XFree86 4.0
* 2001/01/16 - added dispatch override feature for Mesa 3.5
*/
@@ -49,12 +53,9 @@
#include "glapitable.h"
#include "glthread.h"
#if defined(MESA_TRACE)
#include "mtypes.h"
#endif
/* This is used when thread safety is disabled */
struct _glapi_table *_glapi_Dispatch = (struct _glapi_table *) __glapi_noop_table;
struct _glapi_table *_glapi_RealDispatch = (struct _glapi_table *) __glapi_noop_table;
/* Used when thread safety disabled */
void *_glapi_Context = NULL;
@@ -66,6 +67,7 @@ void *_glapi_Context = NULL;
static GLboolean ThreadSafe = GL_FALSE;
static _glthread_TSD DispatchTSD;
static _glthread_TSD RealDispatchTSD; /* only when using override */
static _glthread_TSD ContextTSD;
@@ -76,6 +78,10 @@ static _glthread_TSD ContextTSD;
static GLuint MaxDispatchOffset = sizeof(struct _glapi_table) / sizeof(void *) - 1;
static GLboolean GetSizeCalled = GL_FALSE;
static GLboolean DispatchOverride = GL_FALSE;
/* strdup is actually not a standard ANSI C or POSIX routine
Irix will not define it if ANSI mode is in effect. */
static char *str_dup(const char *str)
@@ -170,10 +176,6 @@ _glapi_get_context(void)
void
_glapi_set_dispatch(struct _glapi_table *dispatch)
{
#if defined(MESA_TRACE)
GLcontext * ctx;
#endif
if (!dispatch) {
/* use the no-op functions */
dispatch = (struct _glapi_table *) __glapi_noop_table;
@@ -185,36 +187,28 @@ _glapi_set_dispatch(struct _glapi_table *dispatch)
#endif
#if defined(THREADS)
#if defined(MESA_TRACE)
ctx = (GLcontext *)_glthread_GetTSD(&ContextTSD);
if (ctx->TraceCtx->traceEnabled == GL_TRUE) {
_glthread_SetTSD(&DispatchTSD, (void *) ctx->TraceDispatch);
if (DispatchOverride) {
_glthread_SetTSD(&RealDispatchTSD, (void *) dispatch);
if (ThreadSafe)
_glapi_Dispatch = NULL;
_glapi_RealDispatch = NULL;
else
_glapi_Dispatch = ctx->TraceDispatch;
_glapi_RealDispatch = dispatch;
}
else {
/* normal operation */
_glthread_SetTSD(&DispatchTSD, (void *) dispatch);
if (ThreadSafe)
_glapi_Dispatch = NULL;
else
_glapi_Dispatch = dispatch;
}
#else
_glthread_SetTSD(&DispatchTSD, (void *) dispatch);
if (ThreadSafe)
_glapi_Dispatch = NULL;
else
_glapi_Dispatch = dispatch;
#endif /*MESA_TRACE*/
#else /*THREADS*/
#if defined(MESA_TRACE)
ctx = (GLcontext *)_glthread_GetTSD(&ContextTSD);
_glapi_Dispatch = ctx->TraceDispatch;
#else
if (DispatchOverride) {
_glapi_RealDispatch = dispatch;
}
else {
_glapi_Dispatch = dispatch;
#endif /*MESA_TRACE*/
}
#endif /*THREADS*/
}
@@ -228,43 +222,109 @@ _glapi_get_dispatch(void)
{
#if defined(THREADS)
if (ThreadSafe) {
if (DispatchOverride) {
return (struct _glapi_table *) _glthread_GetTSD(&RealDispatchTSD);
}
else {
return (struct _glapi_table *) _glthread_GetTSD(&DispatchTSD);
}
}
else {
if (DispatchOverride) {
assert(_glapi_RealDispatch);
return _glapi_RealDispatch;
}
else {
assert(_glapi_Dispatch);
return _glapi_Dispatch;
}
}
#else
return _glapi_Dispatch;
#endif
}
#if defined(MESA_TRACE)
struct _glapi_table *
_glapi_get_true_dispatch(void)
/*
* Notes on dispatch overrride:
*
* Dispatch override allows an external agent to hook into the GL dispatch
* mechanism before execution goes into the core rendering library. For
* example, a trace mechanism would insert itself as an overrider, print
* logging info for each GL function, then dispatch to the real GL function.
*
* libGLS (GL Stream library) is another agent that might use override.
*
* We don't allow more than one layer of overriding at this time.
* In the future we may allow nested/layered override. In that case
* _glapi_begin_dispatch_override() will return an override layer,
* _glapi_end_dispatch_override(layer) will remove an override layer
* and _glapi_get_override_dispatch(layer) will return the dispatch
* table for a given override layer. layer = 0 will be the "real"
* dispatch table.
*/
/*
* Return: dispatch override layer number.
*/
int
_glapi_begin_dispatch_override(struct _glapi_table *override)
{
GLcontext* ctx;
struct _glapi_table *real = _glapi_get_dispatch();
assert(!DispatchOverride); /* can't nest at this time */
DispatchOverride = GL_TRUE;
_glapi_set_dispatch(real);
#if defined(THREADS)
if (ThreadSafe) {
ctx = (GLcontext *) _glthread_GetTSD(&ContextTSD);
assert(ctx);
assert(ctx->CurrentDispatch);
return ctx->CurrentDispatch;
_glthread_SetTSD(&DispatchTSD, (void *) override);
if (ThreadSafe)
_glapi_Dispatch = NULL;
else
_glapi_Dispatch = override;
#else
_glapi_Dispatch = override;
#endif
return 1;
}
void
_glapi_end_dispatch_override(int layer)
{
struct _glapi_table *real = _glapi_get_dispatch();
(void) layer;
DispatchOverride = GL_FALSE;
_glapi_set_dispatch(real);
/* the rest of this isn't needed, just play it safe */
#if defined(THREADS)
_glthread_SetTSD(&RealDispatchTSD, NULL);
#endif
_glapi_RealDispatch = NULL;
}
struct _glapi_table *
_glapi_get_override_dispatch(int layer)
{
if (layer == 0) {
return _glapi_get_dispatch();
}
else {
assert(_glapi_Context);
assert(((GLcontext *)_glapi_Context)->CurrentDispatch);
return ((GLcontext *)_glapi_Context)->CurrentDispatch;
}
if (DispatchOverride) {
#if defined(THREADS)
return (struct _glapi_table *) _glthread_GetTSD(&DispatchTSD);
#else
assert(_glapi_Context);
assert(((GLcontext *)_glapi_Context)->CurrentDispatch);
return ((GLcontext *)_glapi_Context)->CurrentDispatch;
return _glapi_Dispatch;
#endif
}
else {
return NULL;
}
}
}
#endif /* MESA_TRACE */
/*
@@ -287,7 +347,7 @@ _glapi_get_dispatch_table_size(void)
const char *
_glapi_get_version(void)
{
return "20001026"; /* YYYYMMDD */
return "20010116"; /* YYYYMMDD */
}

18
src/mesa/glapi/glapi.h
View File

@@ -1,10 +1,10 @@
/* $Id: glapi.h,v 1.17 2000/09/26 15:27:23 brianp Exp $ */
/* $Id: glapi.h,v 1.18 2001/01/23 23:35:47 brianp Exp $ */
/*
* Mesa 3-D graphics library
* Version: 3.5
*
* Copyright (C) 1999-2000 Brian Paul All Rights Reserved.
* Copyright (C) 1999-2001 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"),
@@ -59,10 +59,16 @@ extern struct _glapi_table *
_glapi_get_dispatch(void);
#if defined(MESA_TRACE)
extern struct _glapi_table *
_glapi_get_true_dispatch(void);
#endif
extern int
_glapi_begin_dispatch_override(struct _glapi_table *override);
extern void
_glapi_end_dispatch_override(int layer);
struct _glapi_table *
_glapi_get_override_dispatch(int layer);
extern GLuint