198 lines
5.4 KiB
C
198 lines
5.4 KiB
C
/*
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* Copyright (c) 2016, NVIDIA CORPORATION.
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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/or associated documentation files (the
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* "Materials"), to deal in the Materials without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Materials, and to
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* permit persons to whom the Materials are furnished to do so, subject to
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* 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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* unaltered in all copies or substantial portions of the Materials.
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* Any additions, deletions, or changes to the original source files
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* must be clearly indicated in accompanying documentation.
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*
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* THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
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*/
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#include "winsys_dispatch.h"
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#include "glvnd_pthread.h"
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#include "lkdhash.h"
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#include <assert.h>
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// The initial size to use when we allocate the function list. This is large
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// enough to hold all of the functions defined in libGLX.
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#define INITIAL_LIST_SIZE 64
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typedef struct __GLVNDwinsysDispatchIndexEntryRec {
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char *name;
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void *dispatchFunc;
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} __GLVNDwinsysDispatchIndexEntry;
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static __GLVNDwinsysDispatchIndexEntry *dispatchIndexList = NULL;
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static int dispatchIndexCount = 0;
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static int dispatchIndexAllocCount = 0;
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void __glvndWinsysDispatchInit(void)
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{
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// Nothing to do.
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}
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void __glvndWinsysDispatchCleanup(void)
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{
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int i;
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for (i=0; i<dispatchIndexCount; i++) {
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free(dispatchIndexList[i].name);
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}
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free(dispatchIndexList);
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dispatchIndexList = NULL;
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dispatchIndexCount = dispatchIndexAllocCount = 0;
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}
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int __glvndWinsysDispatchFindIndex(const char *name)
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{
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int i;
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for (i=0; i<dispatchIndexCount; i++) {
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if (strcmp(dispatchIndexList[i].name, name) == 0) {
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return i;
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}
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}
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return -1;
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}
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int __glvndWinsysDispatchAllocIndex(const char *name, void *dispatch)
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{
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assert(__glvndWinsysDispatchFindIndex(name) < 0);
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if (dispatchIndexCount == dispatchIndexAllocCount) {
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__GLVNDwinsysDispatchIndexEntry *newList;
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int newSize = dispatchIndexAllocCount * 2;
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if (newSize <= 0) {
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newSize = INITIAL_LIST_SIZE;
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}
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newList = realloc(dispatchIndexList, newSize * sizeof(__GLVNDwinsysDispatchIndexEntry));
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if (newList == NULL) {
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return -1;
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}
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dispatchIndexList = newList;
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dispatchIndexAllocCount = newSize;
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}
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dispatchIndexList[dispatchIndexCount].name = strdup(name);
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if (dispatchIndexList[dispatchIndexCount].name == NULL) {
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return -1;
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}
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dispatchIndexList[dispatchIndexCount].dispatchFunc = dispatch;
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return dispatchIndexCount++;
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}
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const char *__glvndWinsysDispatchGetName(int index)
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{
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if (index >= 0 && index < dispatchIndexCount) {
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return dispatchIndexList[index].name;
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} else {
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return NULL;
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}
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}
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void *__glvndWinsysDispatchGetDispatch(int index)
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{
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if (index >= 0 && index < dispatchIndexCount) {
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return dispatchIndexList[index].dispatchFunc;
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} else {
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return NULL;
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}
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}
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int __glvndWinsysDispatchGetCount(void)
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{
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return dispatchIndexCount;
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}
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typedef struct __GLVNDwinsysDispatchFuncHashRec {
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int index;
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void *implFunc;
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UT_hash_handle hh;
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} __GLVNDwinsysDispatchFuncHash;
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struct __GLVNDwinsysVendorDispatchRec {
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DEFINE_LKDHASH(__GLVNDwinsysDispatchFuncHash, table);
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};
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__GLVNDwinsysVendorDispatch *__glvndWinsysVendorDispatchCreate(void)
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{
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__GLVNDwinsysVendorDispatch *table = (__GLVNDwinsysVendorDispatch *)
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malloc(sizeof(__GLVNDwinsysVendorDispatch));
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if (table == NULL) {
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return NULL;
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}
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LKDHASH_INIT(table->table);
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return table;
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}
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void __glvndWinsysVendorDispatchDestroy(__GLVNDwinsysVendorDispatch *table)
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{
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if (table != NULL) {
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LKDHASH_TEARDOWN(__GLVNDwinsysDispatchFuncHash,
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table->table, NULL, NULL, 0);
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free(table);
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}
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}
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int __glvndWinsysVendorDispatchAddFunc(__GLVNDwinsysVendorDispatch *table, int index, void *func)
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{
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__GLVNDwinsysDispatchFuncHash *entry;
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LKDHASH_WRLOCK(table->table);
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HASH_FIND_INT(_LH(table->table), &index, entry);
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if (entry == NULL) {
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entry = (__GLVNDwinsysDispatchFuncHash *) malloc(sizeof(__GLVNDwinsysDispatchFuncHash));
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if (entry == NULL) {
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LKDHASH_UNLOCK(table->table);
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return -1;
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}
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entry->index = index;
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HASH_ADD_INT(_LH(table->table), index, entry);
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}
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entry->implFunc = func;
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LKDHASH_UNLOCK(table->table);
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return 0;
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}
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void *__glvndWinsysVendorDispatchLookupFunc(__GLVNDwinsysVendorDispatch *table, int index)
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{
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__GLVNDwinsysDispatchFuncHash *entry;
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void *func;
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LKDHASH_RDLOCK(table->table);
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HASH_FIND_INT(_LH(table->table), &index, entry);
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if (entry != NULL) {
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func = entry->implFunc;
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} else {
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func = NULL;
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}
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LKDHASH_UNLOCK(table->table);
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return func;
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}
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