headers/private/kernel/sem.h

   1 /*
   2  * Copyright 2002-2009, Axel Dörfler, axeld@pinc-software.de.
   3  * Distributed under the terms of the MIT License.
   4  *
   5  * Copyright 2001-2002, Travis Geiselbrecht. All rights reserved.
   6  * Distributed under the terms of the NewOS License.
   7  */
   8 #ifndef KERNEL_SEM_H
   9 #define KERNEL_SEM_H
  10
  11
  12 #include <OS.h>
  13 #include <thread.h>
  14
  15
  16 struct kernel_args;
  17 struct select_info;
  18
  19
  20 #ifdef __cplusplus
  21 extern "C" {
  22 #endif
  23
  24 extern status_t haiku_sem_init(struct kernel_args *args);
  25 extern void sem_delete_owned_sems(Team* team);
  26 extern int32 sem_used_sems(void);
  27 extern int32 sem_max_sems(void);
  28
  29 extern status_t select_sem(int32 object, struct select_info *info, bool kernel);
  30 extern status_t deselect_sem(int32 object, struct select_info *info,
  31                         bool kernel);
  32
  33 extern sem_id create_sem_etc(int32 count, const char *name, team_id owner);
  34
  35 extern const char* sem_get_name_unsafe(sem_id id);
  36
  37 /* user calls */
  38 sem_id _user_create_sem(int32 count, const char *name);
  39 status_t _user_delete_sem(sem_id id);
  40 status_t _user_acquire_sem(sem_id id);
  41 status_t _user_acquire_sem_etc(sem_id id, int32 count, uint32 flags, bigtime_t timeout);
  42 status_t _user_switch_sem(sem_id releaseSem, sem_id id);
  43 status_t _user_switch_sem_etc(sem_id releaseSem, sem_id id, int32 count, uint32 flags, bigtime_t timeout);
  44 status_t _user_release_sem(sem_id id);
  45 status_t _user_release_sem_etc(sem_id id, int32 count, uint32 flags);
  46 status_t _user_get_sem_count(sem_id id, int32* thread_count);
  47 status_t _user_get_sem_info(sem_id, struct sem_info *, size_t);
  48 status_t _user_get_next_sem_info(team_id, int32 *, struct sem_info *, size_t);
  49 status_t _user_set_sem_owner(sem_id id, team_id team);
  50
  51 #ifdef __cplusplus
  52 }
  53 #endif
  54
  55 #endif  /* KERNEL_SEM_H */