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git.saurik.com Git - apple/libdispatch.git/blob - src/shims/perfmon.h
2 * Copyright (c) 2008-2009 Apple Inc. All rights reserved.
4 * @APPLE_APACHE_LICENSE_HEADER_START@
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
10 * http://www.apache.org/licenses/LICENSE-2.0
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.
18 * @APPLE_APACHE_LICENSE_HEADER_END@
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.
27 #ifndef __DISPATCH_SHIMS_PERFMON__
28 #define __DISPATCH_SHIMS_PERFMON__
32 #if defined (USE_APPLE_TSD_OPTIMIZATIONS) && defined(SIMULATE_5491082) && \
33 (defined(__i386__) || defined(__x86_64__))
35 #define _dispatch_workitem_inc() asm("incq %%gs:%0" : "+m" \
36 (*(void **)(dispatch_bcounter_key * sizeof(void *) + \
37 _PTHREAD_TSD_OFFSET)) :: "cc")
38 #define _dispatch_workitem_dec() asm("decq %%gs:%0" : "+m" \
39 (*(void **)(dispatch_bcounter_key * sizeof(void *) + \
40 _PTHREAD_TSD_OFFSET)) :: "cc")
42 #define _dispatch_workitem_inc() asm("incl %%gs:%0" : "+m" \
43 (*(void **)(dispatch_bcounter_key * sizeof(void *) + \
44 _PTHREAD_TSD_OFFSET)) :: "cc")
45 #define _dispatch_workitem_dec() asm("decl %%gs:%0" : "+m" \
46 (*(void **)(dispatch_bcounter_key * sizeof(void *) + \
47 _PTHREAD_TSD_OFFSET)) :: "cc")
49 #else /* !USE_APPLE_TSD_OPTIMIZATIONS */
51 _dispatch_workitem_inc(void)
54 cnt
= (unsigned long)_dispatch_thread_getspecific(dispatch_bcounter_key
);
55 _dispatch_thread_setspecific(dispatch_bcounter_key
, (void *)++cnt
);
58 _dispatch_workitem_dec(void)
61 cnt
= (unsigned long)_dispatch_thread_getspecific(dispatch_bcounter_key
);
62 _dispatch_thread_setspecific(dispatch_bcounter_key
, (void *)--cnt
);
64 #endif /* USE_APPLE_TSD_OPTIMIZATIONS */
66 // C99 doesn't define flsll() or ffsll()
68 #define flsll(x) flsl(x)
70 static inline unsigned int
85 if (_bucket
.words
.hi
) {
86 return fls(_bucket
.words
.hi
) + 32;
88 return fls(_bucket
.words
.low
);
93 #define _dispatch_workitem_inc()
94 #define _dispatch_workitem_dec()
95 #endif // DISPATCH_PERF_MON