1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
|
/*
* %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: Scheduling of port tasks
*
* Author: Rickard Green
*/
#ifndef ERTS_PORT_TASK_H_BASIC_TYPES__
#define ERTS_PORT_TASK_H_BASIC_TYPES__
#include "erl_sys_driver.h"
#include "erl_smp.h"
#define ERL_PORT_GET_PORT_TYPE_ONLY__
#include "erl_port.h"
#undef ERL_PORT_GET_PORT_TYPE_ONLY__
typedef erts_smp_atomic_t ErtsPortTaskHandle;
#endif
#ifndef ERTS_PORT_TASK_ONLY_BASIC_TYPES__
#ifndef ERL_PORT_TASK_H__
#define ERL_PORT_TASK_H__
#undef ERTS_INCLUDE_SCHEDULER_INTERNALS
#if (defined(ERL_PROCESS_C__) \
|| defined(ERL_PORT_TASK_C__) \
|| defined(ERL_IO_C__) \
|| (ERTS_GLB_INLINE_INCL_FUNC_DEF \
&& defined(ERTS_DO_INCL_GLB_INLINE_FUNC_DEF)))
#define ERTS_INCLUDE_SCHEDULER_INTERNALS
#endif
#define ERTS_PT_FLG_WAIT_BUSY (1 << 0)
#define ERTS_PT_FLG_SIG_DEP (1 << 1)
#define ERTS_PT_FLG_NOSUSPEND (1 << 2)
#define ERTS_PT_FLG_REF (1 << 3)
#define ERTS_PT_FLG_BAD_OUTPUT (1 << 4)
typedef enum {
ERTS_PORT_TASK_INPUT,
ERTS_PORT_TASK_OUTPUT,
ERTS_PORT_TASK_EVENT,
ERTS_PORT_TASK_TIMEOUT,
ERTS_PORT_TASK_DIST_CMD,
ERTS_PORT_TASK_PROC_SIG
} ErtsPortTaskType;
#ifdef ERTS_INCLUDE_SCHEDULER_INTERNALS
/* NOTE: Do not access any of the exported variables directly */
extern erts_smp_atomic_t erts_port_task_outstanding_io_tasks;
#endif
#define ERTS_PTS_FLG_IN_RUNQ (((erts_aint32_t) 1) << 0)
#define ERTS_PTS_FLG_EXEC (((erts_aint32_t) 1) << 1)
#define ERTS_PTS_FLG_HAVE_TASKS (((erts_aint32_t) 1) << 2)
#define ERTS_PTS_FLG_EXIT (((erts_aint32_t) 1) << 3)
#define ERTS_PTS_FLG_BUSY_PORT (((erts_aint32_t) 1) << 4)
#define ERTS_PTS_FLG_BUSY_PORT_Q (((erts_aint32_t) 1) << 5)
#define ERTS_PTS_FLG_CHK_UNSET_BUSY_PORT_Q (((erts_aint32_t) 1) << 6)
#define ERTS_PTS_FLG_HAVE_BUSY_TASKS (((erts_aint32_t) 1) << 7)
#define ERTS_PTS_FLG_HAVE_NS_TASKS (((erts_aint32_t) 1) << 8)
#define ERTS_PTS_FLG_PARALLELISM (((erts_aint32_t) 1) << 9)
#define ERTS_PTS_FLG_FORCE_SCHED (((erts_aint32_t) 1) << 10)
#define ERTS_PTS_FLG_EXITING (((erts_aint32_t) 1) << 11)
#define ERTS_PTS_FLG_EXEC_IMM (((erts_aint32_t) 1) << 12)
#define ERTS_PTS_FLGS_BUSY \
(ERTS_PTS_FLG_BUSY_PORT | ERTS_PTS_FLG_BUSY_PORT_Q)
#define ERTS_PTS_FLGS_FORCE_SCHEDULE_OP \
(ERTS_PTS_FLG_EXIT \
| ERTS_PTS_FLG_HAVE_BUSY_TASKS \
| ERTS_PTS_FLG_HAVE_TASKS \
| ERTS_PTS_FLG_EXEC \
| ERTS_PTS_FLG_EXEC_IMM \
| ERTS_PTS_FLG_FORCE_SCHED \
| ERTS_PTS_FLG_EXITING)
#define ERTS_PORT_TASK_DEFAULT_BUSY_PORT_Q_HIGH 8192
#define ERTS_PORT_TASK_DEFAULT_BUSY_PORT_Q_LOW 4096
typedef struct {
ErlDrvSizeT high;
erts_smp_atomic_t low;
erts_smp_atomic_t size;
} ErtsPortTaskBusyPortQ;
typedef struct ErtsPortTask_ ErtsPortTask;
typedef struct ErtsPortTaskBusyCallerTable_ ErtsPortTaskBusyCallerTable;
typedef struct ErtsPortTaskHandleList_ ErtsPortTaskHandleList;
typedef struct {
Port *next;
struct {
struct {
struct {
ErtsPortTask *first;
ErtsPortTask *last;
ErtsPortTaskBusyCallerTable *table;
ErtsPortTaskHandleList *nosuspend;
} busy;
ErtsPortTask *first;
} local;
struct {
ErtsPortTask *first;
ErtsPortTask *last;
} in;
ErtsPortTaskBusyPortQ *bpq;
} taskq;
erts_smp_atomic32_t flags;
#ifdef ERTS_SMP
erts_mtx_t mtx;
#endif
} ErtsPortTaskSched;
ERTS_GLB_INLINE void erts_port_task_handle_init(ErtsPortTaskHandle *pthp);
ERTS_GLB_INLINE int erts_port_task_is_scheduled(ErtsPortTaskHandle *pthp);
ERTS_GLB_INLINE void erts_port_task_pre_init_sched(ErtsPortTaskSched *ptsp,
ErtsPortTaskBusyPortQ *bpq);
ERTS_GLB_INLINE void erts_port_task_init_sched(ErtsPortTaskSched *ptsp,
Eterm id);
ERTS_GLB_INLINE void erts_port_task_fini_sched(ErtsPortTaskSched *ptsp);
ERTS_GLB_INLINE void erts_port_task_sched_lock(ErtsPortTaskSched *ptsp);
ERTS_GLB_INLINE void erts_port_task_sched_unlock(ErtsPortTaskSched *ptsp);
ERTS_GLB_INLINE int erts_port_task_sched_lock_is_locked(ErtsPortTaskSched *ptsp);
ERTS_GLB_INLINE void erts_port_task_sched_enter_exiting_state(ErtsPortTaskSched *ptsp);
#ifdef ERTS_INCLUDE_SCHEDULER_INTERNALS
ERTS_GLB_INLINE int erts_port_task_have_outstanding_io_tasks(void);
#endif
#if ERTS_GLB_INLINE_INCL_FUNC_DEF
ERTS_GLB_INLINE void
erts_port_task_handle_init(ErtsPortTaskHandle *pthp)
{
erts_smp_atomic_init_nob(pthp, (erts_aint_t) NULL);
}
ERTS_GLB_INLINE int
erts_port_task_is_scheduled(ErtsPortTaskHandle *pthp)
{
return ((void *) erts_smp_atomic_read_acqb(pthp)) != NULL;
}
ERTS_GLB_INLINE void erts_port_task_pre_init_sched(ErtsPortTaskSched *ptsp,
ErtsPortTaskBusyPortQ *bpq)
{
if (bpq) {
erts_aint_t low = (erts_aint_t) ERTS_PORT_TASK_DEFAULT_BUSY_PORT_Q_LOW;
erts_smp_atomic_init_nob(&bpq->low, low);
bpq->high = (ErlDrvSizeT) ERTS_PORT_TASK_DEFAULT_BUSY_PORT_Q_HIGH;
erts_smp_atomic_init_nob(&bpq->size, (erts_aint_t) 0);
}
ptsp->taskq.bpq = bpq;
}
ERTS_GLB_INLINE void
erts_port_task_init_sched(ErtsPortTaskSched *ptsp, Eterm instr_id)
{
#ifdef ERTS_SMP
char *lock_str = "port_sched_lock";
#endif
ptsp->next = NULL;
ptsp->taskq.local.busy.first = NULL;
ptsp->taskq.local.busy.last = NULL;
ptsp->taskq.local.busy.table = NULL;
ptsp->taskq.local.busy.nosuspend = NULL;
ptsp->taskq.local.first = NULL;
ptsp->taskq.in.first = NULL;
ptsp->taskq.in.last = NULL;
erts_smp_atomic32_init_nob(&ptsp->flags, 0);
#ifdef ERTS_SMP
#ifdef ERTS_ENABLE_LOCK_COUNT
erts_mtx_init_x_opt(&ptsp->mtx, lock_str, instr_id,
((erts_lcnt_rt_options & ERTS_LCNT_OPT_PORTLOCK)
? 0 : ERTS_LCNT_LT_DISABLE));
#else
erts_mtx_init_x(&ptsp->mtx, lock_str, instr_id);
#endif
#endif
}
ERTS_GLB_INLINE void
erts_port_task_sched_lock(ErtsPortTaskSched *ptsp)
{
#ifdef ERTS_SMP
erts_mtx_lock(&ptsp->mtx);
#endif
}
ERTS_GLB_INLINE void
erts_port_task_sched_unlock(ErtsPortTaskSched *ptsp)
{
#ifdef ERTS_SMP
erts_mtx_unlock(&ptsp->mtx);
#endif
}
ERTS_GLB_INLINE int
erts_port_task_sched_lock_is_locked(ErtsPortTaskSched *ptsp)
{
#if defined(ERTS_SMP) && defined(ERTS_ENABLE_LOCK_CHECK)
return erts_lc_mtx_is_locked(&ptsp->mtx);
#else
return 0;
#endif
}
ERTS_GLB_INLINE void
erts_port_task_fini_sched(ErtsPortTaskSched *ptsp)
{
#ifdef ERTS_SMP
erts_mtx_destroy(&ptsp->mtx);
#endif
}
ERTS_GLB_INLINE void
erts_port_task_sched_enter_exiting_state(ErtsPortTaskSched *ptsp)
{
erts_smp_atomic32_read_bor_nob(&ptsp->flags, ERTS_PTS_FLG_EXITING);
}
#ifdef ERTS_INCLUDE_SCHEDULER_INTERNALS
ERTS_GLB_INLINE int
erts_port_task_have_outstanding_io_tasks(void)
{
return (erts_smp_atomic_read_acqb(&erts_port_task_outstanding_io_tasks)
!= 0);
}
#endif /* ERTS_INCLUDE_SCHEDULER_INTERNALS */
#endif
#ifdef ERTS_INCLUDE_SCHEDULER_INTERNALS
int erts_port_task_execute(ErtsRunQueue *, Port **);
void erts_port_task_init(void);
#endif
void erts_port_task_tmp_handle_detach(ErtsPortTaskHandle *);
int erts_port_task_abort(ErtsPortTaskHandle *);
void erts_port_task_abort_nosuspend_tasks(Port *);
int erts_port_task_schedule(Eterm,
ErtsPortTaskHandle *,
ErtsPortTaskType,
...);
void erts_port_task_free_port(Port *);
ErtsProc2PortSigData *erts_port_task_alloc_p2p_sig_data(void);
ErtsProc2PortSigData *erts_port_task_alloc_p2p_sig_data_extra(size_t extra, void **extra_ptr);
void erts_port_task_free_p2p_sig_data(ErtsProc2PortSigData *sigdp);
#ifdef ERTS_SMP
void erts_enqueue_port(ErtsRunQueue *rq, Port *pp);
Port *erts_dequeue_port(ErtsRunQueue *rq);
#endif
#undef ERTS_INCLUDE_SCHEDULER_INTERNALS
#endif /* ERL_PORT_TASK_H__ */
#endif /* ERTS_PORT_TASK_ONLY_BASIC_TYPES__ */
|
