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/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 2006-2017. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* %CopyrightEnd%
*/
/*
* Description: Check I/O
*
* Author: Rickard Green
*/
#ifndef ERL_CHECK_IO_H__
#define ERL_CHECK_IO_H__
#include "sys.h"
#include "erl_sys_driver.h"
#ifdef ERTS_ENABLE_KERNEL_POLL
int driver_select_kp(ErlDrvPort, ErlDrvEvent, int, int);
int driver_select_nkp(ErlDrvPort, ErlDrvEvent, int, int);
int enif_select_kp(ErlNifEnv*, ErlNifEvent, enum ErlNifSelectFlags, void*, const ErlNifPid*, Eterm);
int enif_select_nkp(ErlNifEnv*, ErlNifEvent, enum ErlNifSelectFlags, void*, const ErlNifPid*, Eterm);
int driver_event_kp(ErlDrvPort, ErlDrvEvent, ErlDrvEventData);
int driver_event_nkp(ErlDrvPort, ErlDrvEvent, ErlDrvEventData);
Uint erts_check_io_size_kp(void);
Uint erts_check_io_size_nkp(void);
Eterm erts_check_io_info_kp(void *);
Eterm erts_check_io_info_nkp(void *);
int erts_check_io_max_files_kp(void);
int erts_check_io_max_files_nkp(void);
void erts_check_io_interrupt_kp(int);
void erts_check_io_interrupt_nkp(int);
void erts_check_io_interrupt_timed_kp(int, ErtsMonotonicTime);
void erts_check_io_interrupt_timed_nkp(int, ErtsMonotonicTime);
void erts_check_io_kp(int);
void erts_check_io_nkp(int);
void erts_init_check_io_kp(void);
void erts_init_check_io_nkp(void);
int erts_check_io_debug_kp(ErtsCheckIoDebugInfo *);
int erts_check_io_debug_nkp(ErtsCheckIoDebugInfo *);
#ifdef ERTS_ENABLE_LOCK_COUNT
void erts_lcnt_update_cio_locks_kp(int enable);
void erts_lcnt_update_cio_locks_nkp(int enable);
#endif
#else /* !ERTS_ENABLE_KERNEL_POLL */
Uint erts_check_io_size(void);
Eterm erts_check_io_info(void *);
int erts_check_io_max_files(void);
void erts_check_io_interrupt(int);
void erts_check_io_interrupt_timed(int, ErtsMonotonicTime);
void erts_check_io(int);
void erts_init_check_io(void);
#ifdef ERTS_ENABLE_LOCK_COUNT
void erts_lcnt_update_cio_locks(int enable);
#endif
#endif
extern erts_atomic_t erts_check_io_time;
typedef struct {
ErtsPortTaskHandle task;
erts_atomic_t executed_time;
} ErtsIoTask;
ERTS_GLB_INLINE void erts_io_notify_port_task_executed(ErtsPortTaskHandle *pthp);
#if ERTS_GLB_INLINE_INCL_FUNC_DEF
ERTS_GLB_INLINE void
erts_io_notify_port_task_executed(ErtsPortTaskHandle *pthp)
{
ErtsIoTask *itp = (ErtsIoTask *) (((char *) pthp) - offsetof(ErtsIoTask, task));
erts_aint_t ci_time = erts_atomic_read_acqb(&erts_check_io_time);
erts_atomic_set_relb(&itp->executed_time, ci_time);
}
#endif
#endif /* ERL_CHECK_IO_H__ */
#if !defined(ERL_CHECK_IO_C__) && !defined(ERTS_ALLOC_C__)
#define ERL_CHECK_IO_INTERNAL__
#endif
#ifndef ERL_CHECK_IO_INTERNAL__
#define ERL_CHECK_IO_INTERNAL__
#include "erl_poll.h"
#include "erl_port_task.h"
#ifdef __WIN32__
/*
* Current erts_poll implementation for Windows cannot handle
* active events in the set of events polled.
*/
# define ERTS_CIO_DEFER_ACTIVE_EVENTS 1
#else
# define ERTS_CIO_DEFER_ACTIVE_EVENTS 0
#endif
/*
* ErtsDrvEventDataState is used by driver_event() which is almost never
* used. We allocate ErtsDrvEventDataState separate since we dont wan't
* the size of ErtsDrvEventState to increase due to driver_event()
* information.
*/
typedef struct {
Eterm port;
ErlDrvEventData data;
ErtsPollEvents removed_events;
#if ERTS_CIO_DEFER_ACTIVE_EVENTS
ErtsPollEvents deferred_events;
#endif
ErtsIoTask iotask;
} ErtsDrvEventDataState;
typedef struct {
Eterm inport;
Eterm outport;
ErtsIoTask iniotask;
ErtsIoTask outiotask;
} ErtsDrvSelectDataState;
struct erts_nif_select_event {
Eterm pid;
Eterm immed;
Uint32 refn[ERTS_REF_NUMBERS];
Sint32 ddeselect_cnt; /* 0: No delayed deselect in progress
* 1: Do deselect before next poll
* >1: Countdown of ignored events
*/
};
typedef struct {
struct erts_nif_select_event in;
struct erts_nif_select_event out;
} ErtsNifSelectDataState;
#endif /* #ifndef ERL_CHECK_IO_INTERNAL__ */
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