Beginnings of a new, better portable FS shell with Haiku FS interface.
Doesn't do anything ATM, but already provides the required system interface (VFS, caches, POSIX functions). git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20859 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Ingo Weinhold
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/* Kernel specific structures and functions
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*
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* Copyright 2004-2006, Haiku Inc. All Rights Reserved.
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* Distributed under the terms of the MIT License.
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*/
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#ifndef _FSSH_SEM_H
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#define _FSSH_SEM_H
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#include "fssh_types.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*-------------------------------------------------------------*/
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/* System constants */
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#define FSSH_B_OS_NAME_LENGTH 32
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#define FSSH_B_PAGE_SIZE 4096
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#define FSSH_B_INFINITE_TIMEOUT (9223372036854775807LL)
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/*-------------------------------------------------------------*/
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/* Types */
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typedef int32_t fssh_area_id;
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typedef int32_t fssh_port_id;
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typedef int32_t fssh_sem_id;
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typedef int32_t fssh_team_id;
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typedef int32_t fssh_thread_id;
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/*-------------------------------------------------------------*/
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/* Semaphores */
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typedef struct fssh_sem_info {
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fssh_sem_id sem;
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fssh_team_id team;
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char name[FSSH_B_OS_NAME_LENGTH];
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int32_t count;
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fssh_thread_id latest_holder;
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} fssh_sem_info;
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/* semaphore flags */
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enum {
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FSSH_B_CAN_INTERRUPT = 0x01, // acquisition of the semaphore can be
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// interrupted (system use only)
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FSSH_B_CHECK_PERMISSION = 0x04, // ownership will be checked (system use
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// only)
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FSSH_B_KILL_CAN_INTERRUPT = 0x20, // acquisition of the semaphore can be
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// interrupted by SIGKILL[THR], even
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// if not B_CAN_INTERRUPT (system use
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// only)
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/* release_sem_etc() only flags */
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FSSH_B_DO_NOT_RESCHEDULE = 0x02, // thread is not rescheduled
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FSSH_B_RELEASE_ALL = 0x08, // all waiting threads will be woken up,
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// count will be zeroed
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FSSH_B_RELEASE_IF_WAITING_ONLY = 0x10 // release count only if there are any
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// threads waiting
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};
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extern fssh_sem_id fssh_create_sem(int32_t count, const char *name);
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extern fssh_status_t fssh_delete_sem(fssh_sem_id id);
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extern fssh_status_t fssh_acquire_sem(fssh_sem_id id);
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extern fssh_status_t fssh_acquire_sem_etc(fssh_sem_id id, int32_t count,
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uint32_t flags, fssh_bigtime_t timeout);
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extern fssh_status_t fssh_release_sem(fssh_sem_id id);
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extern fssh_status_t fssh_release_sem_etc(fssh_sem_id id, int32_t count,
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uint32_t flags);
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extern fssh_status_t fssh_get_sem_count(fssh_sem_id id,
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int32_t *threadCount);
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extern fssh_status_t fssh_set_sem_owner(fssh_sem_id id, fssh_team_id team);
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/* system private, use the macros instead */
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extern fssh_status_t _fssh_get_sem_info(fssh_sem_id id,
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struct fssh_sem_info *info, fssh_size_t infoSize);
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extern fssh_status_t _fssh_get_next_sem_info(fssh_team_id team,
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int32_t *cookie, struct fssh_sem_info *info,
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fssh_size_t infoSize);
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#define fssh_get_sem_info(sem, info) \
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_fssh_get_sem_info((sem), (info), sizeof(*(info)))
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#define fssh_get_next_sem_info(team, cookie, info) \
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_fssh_get_next_sem_info((team), (cookie), (info), sizeof(*(info)))
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enum {
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FSSH_B_TIMEOUT = 8, /* relative timeout */
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FSSH_B_RELATIVE_TIMEOUT = 8, /* fails after a relative timeout with B_WOULD_BLOCK */
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FSSH_B_ABSOLUTE_TIMEOUT = 16 /* fails after an absolute timeout with B_WOULD BLOCK */
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};
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/*-------------------------------------------------------------*/
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/* Teams */
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#define FSSH_B_CURRENT_TEAM 0
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#define FSSH_B_SYSTEM_TEAM 1
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/*-------------------------------------------------------------*/
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/* Threads */
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typedef enum {
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FSSH_B_THREAD_RUNNING = 1,
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FSSH_B_THREAD_READY,
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FSSH_B_THREAD_RECEIVING,
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FSSH_B_THREAD_ASLEEP,
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FSSH_B_THREAD_SUSPENDED,
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FSSH_B_THREAD_WAITING
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} fssh_thread_state;
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typedef struct {
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fssh_thread_id thread;
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fssh_team_id team;
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char name[FSSH_B_OS_NAME_LENGTH];
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fssh_thread_state state;
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int32_t priority;
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fssh_sem_id sem;
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fssh_bigtime_t user_time;
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fssh_bigtime_t kernel_time;
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void *stack_base;
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void *stack_end;
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} fssh_thread_info;
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#define FSSH_B_IDLE_PRIORITY 0
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#define FSSH_B_LOWEST_ACTIVE_PRIORITY 1
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#define FSSH_B_LOW_PRIORITY 5
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#define FSSH_B_NORMAL_PRIORITY 10
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#define FSSH_B_DISPLAY_PRIORITY 15
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#define FSSH_B_URGENT_DISPLAY_PRIORITY 20
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#define FSSH_B_REAL_TIME_DISPLAY_PRIORITY 100
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#define FSSH_B_URGENT_PRIORITY 110
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#define FSSH_B_REAL_TIME_PRIORITY 120
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#define FSSH_B_FIRST_REAL_TIME_PRIORITY B_REAL_TIME_DISPLAY_PRIORITY
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#define FSSH_B_MIN_PRIORITY B_IDLE_PRIORITY
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#define FSSH_B_MAX_PRIORITY B_REAL_TIME_PRIORITY
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#define FSSH_B_SYSTEM_TIMEBASE 0
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typedef fssh_status_t (*fssh_thread_func)(void *);
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#define fssh_thread_entry fssh_thread_func
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/* thread_entry is for backward compatibility only! Use thread_func */
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extern fssh_thread_id fssh_spawn_thread(fssh_thread_func, const char *name,
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int32_t priority, void *data);
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extern fssh_status_t fssh_kill_thread(fssh_thread_id thread);
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extern fssh_status_t fssh_resume_thread(fssh_thread_id thread);
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extern fssh_status_t fssh_suspend_thread(fssh_thread_id thread);
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extern fssh_status_t fssh_rename_thread(fssh_thread_id thread,
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const char *newName);
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extern fssh_status_t fssh_set_thread_priority (fssh_thread_id thread,
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int32_t newPriority);
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extern void fssh_exit_thread(fssh_status_t status);
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extern fssh_status_t fssh_wait_for_thread (fssh_thread_id thread,
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fssh_status_t *threadReturnValue);
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extern fssh_status_t fssh_on_exit_thread(void (*callback)(void *),
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void *data);
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extern fssh_thread_id fssh_find_thread(const char *name);
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extern fssh_status_t fssh_send_data(fssh_thread_id thread, int32_t code,
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const void *buffer,
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fssh_size_t bufferSize);
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extern int32_t fssh_receive_data(fssh_thread_id *sender, void *buffer,
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fssh_size_t bufferSize);
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extern bool fssh_has_data(fssh_thread_id thread);
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extern fssh_status_t fssh_snooze(fssh_bigtime_t amount);
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extern fssh_status_t fssh_snooze_etc(fssh_bigtime_t amount, int timeBase,
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uint32_t flags);
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extern fssh_status_t fssh_snooze_until(fssh_bigtime_t time, int timeBase);
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/* system private, use macros instead */
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extern fssh_status_t _fssh_get_thread_info(fssh_thread_id id,
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fssh_thread_info *info, fssh_size_t size);
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extern fssh_status_t _fssh_get_next_thread_info(fssh_team_id team,
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int32_t *cookie, fssh_thread_info *info,
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fssh_size_t size);
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#define fssh_get_thread_info(id, info) \
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_fssh_get_thread_info((id), (info), sizeof(*(info)))
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#define fssh_get_next_thread_info(team, cookie, info) \
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_fssh_get_next_thread_info((team), (cookie), (info), sizeof(*(info)))
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/*-------------------------------------------------------------*/
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/* Time */
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extern uint32_t fssh_real_time_clock(void);
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extern void fssh_set_real_time_clock(uint32_t secs_since_jan1_1970);
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extern fssh_bigtime_t fssh_real_time_clock_usecs(void);
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extern fssh_status_t fssh_set_timezone(char *timezone);
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extern fssh_bigtime_t fssh_system_time(void); /* time since booting in microseconds */
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#ifdef __cplusplus
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}
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#endif
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#endif // _FSSH_TYPES_H
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