1 /*********************************************************************
3 * Copyright 2012 Intel Corporation
6 * Permission is hereby granted, free of charge, to any person
7 * obtaining a copy of this software and associated documentation
8 * files (the "Software"), to deal in the Software without
9 * restriction, including without limitation the rights to use, copy,
10 * modify, merge, publish, distribute, sublicense, and/or sell copies
11 * of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be
15 * included in all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
20 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
21 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
22 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
23 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
26 *********************************************************************/
37 #include <gltrace.hpp>
38 #include <os_thread.hpp>
42 typedef std::tr1::shared_ptr<Context> context_ptr_t;
43 static std::map<uintptr_t, context_ptr_t> context_map;
44 static os::recursive_mutex context_map_mutex;
48 context_ptr_t current_context;
49 context_ptr_t dummy_context; /*
50 * For cases when there is no current
51 * context, but the app still calls some
52 * GL function that expects one.
54 ThreadState() : dummy_context(new Context)
56 current_context = dummy_context;
60 static thread_specific ThreadState *thread_state;
62 static ThreadState *get_ts(void)
64 ThreadState *ts = thread_state;
66 thread_state = ts = new ThreadState;
72 static void _retainContext(context_ptr_t ctx)
77 void retainContext(uintptr_t context_id)
79 context_map_mutex.lock();
80 if (context_map.find(context_id) != context_map.end())
81 _retainContext(context_map[context_id]);
82 context_map_mutex.unlock();
85 static bool _releaseContext(context_ptr_t ctx)
87 return !(--ctx->retain_count);
91 * return true if the context was destroyed, false if only its refcount
92 * got decreased. Note that even if the context was destroyed it may
93 * still live, if it's the currently selected context (by setContext).
95 bool releaseContext(uintptr_t context_id)
99 context_map_mutex.lock();
101 * This can potentially called (from glX) with an invalid context_id,
102 * so don't assert on it being valid.
104 if (context_map.find(context_id) != context_map.end()) {
105 res = _releaseContext(context_map[context_id]);
107 context_map.erase(context_id);
109 context_map_mutex.unlock();
114 void createContext(uintptr_t context_id)
116 // wglCreateContextAttribsARB causes internal calls to wglCreateContext to be
117 // traced, causing context to be defined twice.
118 if (context_map.find(context_id) != context_map.end()) {
122 context_ptr_t ctx(new Context);
124 context_map_mutex.lock();
127 context_map[context_id] = ctx;
129 context_map_mutex.unlock();
132 void setContext(uintptr_t context_id)
134 ThreadState *ts = get_ts();
137 context_map_mutex.lock();
139 assert(context_map.find(context_id) != context_map.end());
140 ctx = context_map[context_id];
142 context_map_mutex.unlock();
144 ts->current_context = ctx;
147 void clearContext(void)
149 ThreadState *ts = get_ts();
151 ts->current_context = ts->dummy_context;
154 Context *getContext(void)
156 return get_ts()->current_context.get();