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61d40ae4d0
When not using the USE_ELF_TLS code-path, this function is thread-unsafe, because it returns u_current_table if set without consulting the ThreadSafe variable in u_current.c. There's a short period where this can cause problems, if a program uses multiple threads, but only have made a single context current so far. If the program issues OpenGL commands from the initialized thread while a new thread is setting u_current_table to __glapi_noop_table, we will return the wrong table here. It doesn't seem right to have two versions of the code that does the same anyway, so let's use the version that doesn't have this problem instead. Reviewed-by: Ian Romanick <ian.d.romanick@intel.com> Reviewed-by: Louis-Francis Ratté-Boulianne <lfrb@collabora.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7280>
107 lines
2.8 KiB
C
107 lines
2.8 KiB
C
/*
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* Mesa 3-D graphics library
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*
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* Copyright (C) 2010 LunarG Inc.
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*
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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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*
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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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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* 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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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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* Authors:
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* Chia-I Wu <olv@lunarg.com>
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*/
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#include <stdlib.h>
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#include <stdint.h>
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#include "entry.h"
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#include "u_current.h"
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#include "util/u_endian.h"
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#define _U_STRINGIFY(x) #x
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#define U_STRINGIFY(x) _U_STRINGIFY(x)
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/* define macros for use by assembly dispatchers */
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#define ENTRY_CURRENT_TABLE U_STRINGIFY(u_current_table)
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/* in bridge mode, mapi is a user of glapi */
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#ifdef MAPI_MODE_BRIDGE
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#define ENTRY_CURRENT_TABLE_GET "_glapi_get_dispatch"
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#else
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#define ENTRY_CURRENT_TABLE_GET U_STRINGIFY(u_current_get_table_internal)
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#endif
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#if defined(USE_X86_ASM) && defined(__GNUC__)
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# ifdef USE_ELF_TLS
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# include "entry_x86_tls.h"
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# else
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# include "entry_x86_tsd.h"
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# endif
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#elif defined(USE_X86_64_ASM) && defined(__GNUC__) && defined(USE_ELF_TLS)
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# include "entry_x86-64_tls.h"
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#elif defined(USE_PPC64LE_ASM) && defined(__GNUC__) && UTIL_ARCH_LITTLE_ENDIAN
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# ifdef USE_ELF_TLS
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# include "entry_ppc64le_tls.h"
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# else
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# include "entry_ppc64le_tsd.h"
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# endif
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#else
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static inline const struct _glapi_table *
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entry_current_get(void)
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{
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#ifdef MAPI_MODE_BRIDGE
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return GET_DISPATCH();
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#else
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return u_current_get_table_internal();
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#endif
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}
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/* C version of the public entries */
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#define MAPI_TMP_DEFINES
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#define MAPI_TMP_PUBLIC_DECLARES
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#define MAPI_TMP_PUBLIC_ENTRIES
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#include "mapi_tmp.h"
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#ifndef MAPI_MODE_BRIDGE
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void
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entry_patch_public(void)
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{
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}
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mapi_func
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entry_get_public(int slot)
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{
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/* pubic_entries are defined by MAPI_TMP_PUBLIC_ENTRIES */
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return public_entries[slot];
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}
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mapi_func
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entry_generate(int slot)
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{
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return NULL;
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}
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void
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entry_patch(mapi_func entry, int slot)
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{
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}
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#endif /* MAPI_MODE_BRIDGE */
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#endif /* asm */
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