1 | /* |
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3 | * |
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5 | * |
6 | * This file contains Original Code and/or Modifications of Original Code |
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26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ |
27 | */ |
28 | /* |
29 | * @OSF_COPYRIGHT@ |
30 | * |
31 | */ |
32 | /* |
33 | * File: kern/sync_sema.h |
34 | * Author: Joseph CaraDonna |
35 | * |
36 | * Contains RT distributed semaphore synchronization service definitions. |
37 | */ |
38 | |
39 | #ifndef _KERN_SYNC_SEMA_H_ |
40 | #define _KERN_SYNC_SEMA_H_ |
41 | |
42 | #include <kern/kern_types.h> |
43 | #include <mach/sync_policy.h> |
44 | #include <mach/clock_types.h> |
45 | |
46 | #ifdef MACH_KERNEL_PRIVATE |
47 | |
48 | #include <kern/queue.h> |
49 | #include <kern/waitq.h> |
50 | #include <os/refcnt.h> |
51 | |
52 | typedef struct semaphore { |
53 | queue_chain_t task_link; /* chain of semaphores owned by a task */ |
54 | struct waitq waitq; /* queue of blocked threads & lock */ |
55 | task_t owner; /* task that owns semaphore */ |
56 | ipc_port_t port; /* semaphore port */ |
57 | os_ref_atomic_t ref_count; /* reference count */ |
58 | int count; /* current count value */ |
59 | } Semaphore; |
60 | |
61 | #define semaphore_lock(semaphore) waitq_lock(&(semaphore)->waitq) |
62 | #define semaphore_unlock(semaphore) waitq_unlock(&(semaphore)->waitq) |
63 | |
64 | extern void semaphore_reference( |
65 | semaphore_t semaphore); |
66 | |
67 | extern void semaphore_dereference( |
68 | semaphore_t semaphore); |
69 | |
70 | #pragma GCC visibility push(hidden) |
71 | |
72 | extern void semaphore_destroy_all( |
73 | task_t task); |
74 | |
75 | extern semaphore_t convert_port_to_semaphore( |
76 | ipc_port_t port); |
77 | |
78 | extern ipc_port_t convert_semaphore_to_port( |
79 | semaphore_t semaphore); |
80 | |
81 | extern kern_return_t port_name_to_semaphore( |
82 | mach_port_name_t name, |
83 | semaphore_t *semaphore); |
84 | |
85 | #pragma GCC visibility pop |
86 | #endif /* MACH_KERNEL_PRIVATE */ |
87 | #if XNU_KERNEL_PRIVATE |
88 | #pragma GCC visibility push(hidden) |
89 | |
90 | #define SEMAPHORE_CONT_NULL ((semaphore_cont_t)NULL) |
91 | typedef void (*semaphore_cont_t)(kern_return_t); |
92 | |
93 | extern kern_return_t semaphore_signal_internal_trap( |
94 | mach_port_name_t sema_name); |
95 | |
96 | extern kern_return_t semaphore_timedwait_signal_trap_internal( |
97 | mach_port_name_t wait_name, |
98 | mach_port_name_t signal_name, |
99 | unsigned int sec, |
100 | clock_res_t nsec, |
101 | semaphore_cont_t); |
102 | |
103 | extern kern_return_t semaphore_timedwait_trap_internal( |
104 | mach_port_name_t name, |
105 | unsigned int sec, |
106 | clock_res_t nsec, |
107 | semaphore_cont_t); |
108 | |
109 | extern kern_return_t semaphore_wait_signal_trap_internal( |
110 | mach_port_name_t wait_name, |
111 | mach_port_name_t signal_name, |
112 | semaphore_cont_t); |
113 | |
114 | extern kern_return_t semaphore_wait_trap_internal( |
115 | mach_port_name_t name, |
116 | semaphore_cont_t); |
117 | |
118 | #pragma GCC visibility pop |
119 | #endif /* XNU_KERNEL_PRIVATE */ |
120 | #endif /* _KERN_SYNC_SEMA_H_ */ |
121 | |