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1 /*
2 * Copyright (c) 2008-2013 Apple Inc. All rights reserved.
3 *
4 * @APPLE_APACHE_LICENSE_HEADER_START@
5 *
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 *
18 * @APPLE_APACHE_LICENSE_HEADER_END@
19 */
20
21 /*
22 * IMPORTANT: This header file describes INTERNAL interfaces to libdispatch
23 * which are subject to change in future releases of Mac OS X. Any applications
24 * relying on these interfaces WILL break.
25 */
26
27 #ifndef __DISPATCH_SHIMS_PERFMON__
28 #define __DISPATCH_SHIMS_PERFMON__
29
30 #if DISPATCH_PERF_MON && !DISPATCH_INTROSPECTION
31
32 #if defined (USE_APPLE_TSD_OPTIMIZATIONS) && defined(SIMULATE_5491082) && \
33 (defined(__i386__) || defined(__x86_64__))
34 #ifdef __LP64__
35 #define _dispatch_perfmon_workitem_inc() asm("incq %%gs:%0" : "+m" \
36 (*(void **)(dispatch_bcounter_key * sizeof(void *) + \
37 _PTHREAD_TSD_OFFSET)) :: "cc")
38 #define _dispatch_perfmon_workitem_dec() asm("decq %%gs:%0" : "+m" \
39 (*(void **)(dispatch_bcounter_key * sizeof(void *) + \
40 _PTHREAD_TSD_OFFSET)) :: "cc")
41 #else
42 #define _dispatch_perfmon_workitem_inc() asm("incl %%gs:%0" : "+m" \
43 (*(void **)(dispatch_bcounter_key * sizeof(void *) + \
44 _PTHREAD_TSD_OFFSET)) :: "cc")
45 #define _dispatch_perfmon_workitem_dec() asm("decl %%gs:%0" : "+m" \
46 (*(void **)(dispatch_bcounter_key * sizeof(void *) + \
47 _PTHREAD_TSD_OFFSET)) :: "cc")
48 #endif
49 #else /* !USE_APPLE_TSD_OPTIMIZATIONS */
50 static inline void
51 _dispatch_perfmon_workitem_inc(void)
52 {
53 unsigned long cnt;
54 cnt = (unsigned long)_dispatch_thread_getspecific(dispatch_bcounter_key);
55 _dispatch_thread_setspecific(dispatch_bcounter_key, (void *)++cnt);
56 }
57 static inline void
58 _dispatch_perfmon_workitem_dec(void)
59 {
60 unsigned long cnt;
61 cnt = (unsigned long)_dispatch_thread_getspecific(dispatch_bcounter_key);
62 _dispatch_thread_setspecific(dispatch_bcounter_key, (void *)--cnt);
63 }
64 #endif /* USE_APPLE_TSD_OPTIMIZATIONS */
65
66 #define _dispatch_perfmon_start() \
67 uint64_t start = _dispatch_absolute_time()
68 #define _dispatch_perfmon_end() \
69 _dispatch_queue_merge_stats(start)
70 #else
71
72 #define _dispatch_perfmon_workitem_inc()
73 #define _dispatch_perfmon_workitem_dec()
74 #define _dispatch_perfmon_start()
75 #define _dispatch_perfmon_end()
76
77 #endif // DISPATCH_PERF_MON
78
79 #endif