include/kernel/sem.h

   1 /*
   2 ** Copyright 2001-2002, Travis Geiselbrecht. All rights reserved.
   3 ** Distributed under the terms of the NewOS License.
   4 */
   5 #ifndef _KERNEL_SEM_H
   6 #define _KERNEL_SEM_H
   7
   8 #include <kernel/thread.h>
   9 #include <boot/stage2.h>
  10
  11 #define SEM_FLAG_NO_RESCHED 1
  12 #define SEM_FLAG_TIMEOUT 2
  13 #define SEM_FLAG_INTERRUPTABLE 4
  14
  15 struct sem_info {
  16         sem_id          sem;
  17         proc_id         proc;
  18         char            name[SYS_MAX_OS_NAME_LEN];
  19         int32           count;
  20         thread_id       latest_holder;
  21 };
  22
  23 int sem_init(kernel_args *ka);
  24 sem_id sem_create_etc(int count, const char *name, proc_id owner);
  25 sem_id sem_create(int count, const char *name);
  26 int sem_delete(sem_id id);
  27 int sem_delete_etc(sem_id id, int return_code);
  28 int sem_acquire(sem_id id, int count);
  29 int sem_acquire_etc(sem_id id, int count, int flags, bigtime_t timeout, int *deleted_retcode);
  30 int sem_release(sem_id id, int count);
  31 int sem_release_etc(sem_id id, int count, int flags);
  32 int sem_get_count(sem_id id, int32* thread_count);
  33 int sem_get_sem_info(sem_id id, struct sem_info *info);
  34 int sem_get_next_sem_info(proc_id proc, uint32 *cookie, struct sem_info *info);
  35 int set_sem_owner(sem_id id, proc_id proc);
  36
  37 sem_id user_sem_create(int count, const char *name);
  38 int user_sem_delete(sem_id id);
  39 int user_sem_delete_etc(sem_id id, int return_code);
  40 int user_sem_acquire(sem_id id, int count);
  41 int user_sem_acquire_etc(sem_id id, int count, int flags, bigtime_t timeout, int *deleted_retcode);
  42 int user_sem_release(sem_id id, int count);
  43 int user_sem_release_etc(sem_id id, int count, int flags);
  44 int user_sem_get_count(sem_id id, int32* thread_count);
  45 int user_sem_get_sem_info(sem_id id, struct sem_info *info);
  46 int user_sem_get_next_sem_info(proc_id proc, uint32 *cookie, struct sem_info *info);
  47 int user_set_sem_owner(sem_id id, proc_id proc);
  48
  49 int sem_delete_owned_sems(proc_id owner);
  50 int sem_interrupt_thread(struct thread *t);
  51
  52 #endif
  53