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* Mesa 3-D graphics library
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* Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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* \mainpage Mesa GL API Module
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* \section GLAPIIntroduction Introduction
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* The Mesa GL API module is responsible for dispatching all the
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* gl*() functions. All GL functions are dispatched by jumping through
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* the current dispatch table (basically a struct full of function
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* A per-thread current dispatch table and per-thread current context
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* pointer are managed by this module too.
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* This module is intended to be non-Mesa-specific so it can be used
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* with the X/DRI libGL also.
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typedef void (*_glapi_proc)(void); /* generic function pointer */
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#if defined(USE_MGL_NAMESPACE)
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#define _glapi_set_dispatch _mglapi_set_dispatch
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#define _glapi_get_dispatch _mglapi_get_dispatch
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#define _glapi_set_context _mglapi_set_context
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#define _glapi_get_context _mglapi_get_context
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#define _glapi_Dispatch _mglapi_Dispatch
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#define _glapi_Context _mglapi_Context
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# define likely(x) __builtin_expect(!!(x), 1)
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# define unlikely(x) __builtin_expect(!!(x), 0)
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# define likely(x) (x)
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# define unlikely(x) (x)
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** Define the GET_DISPATCH() and GET_CURRENT_CONTEXT() macros.
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** \param C local variable which will hold the current context.
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#if defined (GLX_USE_TLS)
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extern const struct _glapi_table *_glapi_Dispatch;
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extern const void *_glapi_Context;
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extern __thread struct _glapi_table * _glapi_tls_Dispatch
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__attribute__((tls_model("initial-exec")));
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extern __thread void * _glapi_tls_Context
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__attribute__((tls_model("initial-exec")));
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# define GET_DISPATCH() _glapi_tls_Dispatch
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# define GET_CURRENT_CONTEXT(C) GLcontext *C = (GLcontext *) _glapi_tls_Context
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extern struct _glapi_table *_glapi_Dispatch;
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extern void *_glapi_Context;
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# define GET_DISPATCH() \
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(likely(_glapi_Dispatch) ? _glapi_Dispatch : _glapi_get_dispatch())
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# define GET_CURRENT_CONTEXT(C) GLcontext *C = (GLcontext *) \
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(likely(_glapi_Context) ? _glapi_Context : _glapi_get_context())
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# define GET_DISPATCH() _glapi_Dispatch
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# define GET_CURRENT_CONTEXT(C) GLcontext *C = (GLcontext *) _glapi_Context
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#endif /* defined (GLX_USE_TLS) */
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** GL API public functions
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_glapi_init_multithread(void);
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_glapi_destroy_multithread(void);
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_glapi_check_multithread(void);
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_glapi_set_context(void *context);
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_glapi_get_context(void);
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_glapi_set_dispatch(struct _glapi_table *dispatch);
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extern struct _glapi_table *
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_glapi_get_dispatch(void);
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_glapi_get_dispatch_table_size(void);
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_glapi_add_dispatch( const char * const * function_names,
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const char * parameter_signature );
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_glapi_get_proc_offset(const char *funcName);
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_glapi_get_proc_address(const char *funcName);
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* GL API local functions and defines
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init_glapi_relocs_once(void);
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_glapi_check_table_not_null(const struct _glapi_table *table);
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_glapi_check_table(const struct _glapi_table *table);
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_glapi_get_proc_name(unsigned int offset);
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* Number of extension functions which we can dynamically add at runtime.
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#define MAX_EXTENSION_FUNCS 300