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1 /*

3 *

4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@

5 *

6 * This file contains Original Code and/or Modifications of Original Code

7 * as defined in and that are subject to the Apple Public Source License

8 * Version 2.0 (the 'License'). You may not use this file except in

9 * compliance with the License. The rights granted to you under the License

10 * may not be used to create, or enable the creation or redistribution of,

11 * unlawful or unlicensed copies of an Apple operating system, or to

12 * circumvent, violate, or enable the circumvention or violation of, any

13 * terms of an Apple operating system software license agreement.

14 *

15 * Please obtain a copy of the License at

16 * http://www.opensource.apple.com/apsl/ and read it before using this file.

17 *

18 * The Original Code and all software distributed under the License are

19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER

20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,

21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,

22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.

23 * Please see the License for the specific language governing rights and

24 * limitations under the License.

25 *

26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@

27 */

29 #ifndef _MACH_SEMAPHORE_H_

30 #define _MACH_SEMAPHORE_H_

32 #include <mach/port.h>

33 #include <mach/mach_types.h>

34 #include <mach/kern_return.h>

35 #include <mach/sync_policy.h>

37 /*

38 * Forward Declarations

39 *

40 * The semaphore creation and deallocation routines are

41 * defined with the Mach task APIs in <mach/task.h>.

42 *

43 * kern_return_t semaphore_create(task_t task,

44 * semaphore_t *new_semaphore,

45 * sync_policy_t policy,

46 * int value);

47 *

48 * kern_return_t semaphore_destroy(task_t task,

49 * semaphore_t semaphore);

50 */

52 #include <sys/cdefs.h>

53 __BEGIN_DECLS

55 extern kern_return_t semaphore_signal(semaphore_t semaphore);

56 extern kern_return_t semaphore_signal_all(semaphore_t semaphore);

58 extern kern_return_t semaphore_wait(semaphore_t semaphore);

60 #ifdef KERNEL

62 #ifdef __LP64__

64 #ifdef KERNEL_PRIVATE

66 extern kern_return_t semaphore_timedwait(semaphore_t semaphore,

67 mach_timespec_t wait_time);

69 #endif /* KERNEL_PRIVATE */

71 #else /* __LP64__ */

73 extern kern_return_t semaphore_timedwait(semaphore_t semaphore,

74 mach_timespec_t wait_time);

76 #endif /* __LP64__ */

78 extern kern_return_t semaphore_wait_deadline(semaphore_t semaphore,

79 uint64_t deadline);

80 extern kern_return_t semaphore_wait_noblock(semaphore_t semaphore);

82 #ifdef XNU_KERNEL_PRIVATE

84 extern kern_return_t semaphore_wait_signal(semaphore_t wait_semaphore,

85 semaphore_t signal_semaphore);

87 extern kern_return_t semaphore_timedwait_signal(semaphore_t wait_semaphore,

88 semaphore_t signal_semaphore,

89 mach_timespec_t wait_time);

91 extern kern_return_t semaphore_signal_thread(semaphore_t semaphore,

92 thread_t thread);

94 #endif /* XNU_KERNEL_PRIVATE */

96 #else /* KERNEL */

98 extern kern_return_t semaphore_timedwait(semaphore_t semaphore,

99 mach_timespec_t wait_time);

100

101 extern kern_return_t semaphore_timedwait_signal(semaphore_t wait_semaphore,

102 semaphore_t signal_semaphore,

103 mach_timespec_t wait_time);

104

105 extern kern_return_t semaphore_wait_signal(semaphore_t wait_semaphore,

106 semaphore_t signal_semaphore);

107

108 extern kern_return_t semaphore_signal_thread(semaphore_t semaphore,

109 thread_t thread);

110

111 #endif /* KERNEL */

112

113 __END_DECLS

114

115 #ifdef PRIVATE

116

117 #define SEMAPHORE_OPTION_NONE 0x00000000

118

119 #define SEMAPHORE_SIGNAL 0x00000001

120 #define SEMAPHORE_WAIT 0x00000002

121 #define SEMAPHORE_WAIT_ON_SIGNAL 0x00000008

122

123 #define SEMAPHORE_SIGNAL_TIMEOUT 0x00000010

124 #define SEMAPHORE_SIGNAL_ALL 0x00000020

125 #define SEMAPHORE_SIGNAL_INTERRUPT 0x00000040 /* libmach implements */

126 #define SEMAPHORE_SIGNAL_PREPOST 0x00000080

127

128 #define SEMAPHORE_WAIT_TIMEOUT 0x00000100

129 #define SEMAPHORE_WAIT_INTERRUPT 0x00000400 /* libmach implements */

130

131 #define SEMAPHORE_TIMEOUT_NOBLOCK 0x00100000

132 #define SEMAPHORE_TIMEOUT_RELATIVE 0x00200000

133

134 #define SEMAPHORE_USE_SAVED_RESULT 0x01000000 /* internal use only */

135 #define SEMAPHORE_SIGNAL_RELEASE 0x02000000 /* internal use only */

136 #define SEMAPHORE_THREAD_HANDOFF 0x04000000

137

138 #endif /* PRIVATE */

139

140 #endif /* _MACH_SEMAPHORE_H_ */