summaryrefslogtreecommitdiffstats
path: root/examples/performance-thread/common/lthread_int.h
blob: 031d8afc486f13ff2eb3e55383bdfe01f54670fc (plain)
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
/*-
 *   BSD LICENSE
 *
 *   Copyright(c) 2015 Intel Corporation. All rights reserved.
 *   All rights reserved.
 *
 *   Redistribution and use in source and binary forms, with or without
 *   modification, are permitted provided that the following conditions
 *   are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in
 *       the documentation and/or other materials provided with the
 *       distribution.
 *     * Neither the name of Intel Corporation nor the names of its
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * Some portions of this software may have been derived from the
 * https://github.com/halayli/lthread which carrys the following license.
 *
 * Copyright (C) 2012, Hasan Alayli <halayli@gmail.com>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */
#ifndef LTHREAD_INT_H
#include <lthread_api.h>
#define LTHREAD_INT_H

#include <stdint.h>
#include <sys/time.h>
#include <sys/types.h>
#include <errno.h>
#include <pthread.h>
#include <time.h>

#include <rte_memory.h>
#include <rte_cycles.h>
#include <rte_per_lcore.h>
#include <rte_timer.h>
#include <rte_atomic_64.h>
#include <rte_spinlock.h>
#include <ctx.h>

#include <lthread_api.h>
#include "lthread.h"
#include "lthread_diag.h"
#include "lthread_tls.h"

struct lthread;
struct lthread_sched;
struct lthread_cond;
struct lthread_mutex;
struct lthread_key;

struct key_pool;
struct qnode;
struct qnode_pool;
struct lthread_sched;
struct lthread_tls;


#define BIT(x) (1 << (x))
#define CLEARBIT(x) ~(1 << (x))

#define POSIX_ERRNO(x)  (x)

#define MAX_LTHREAD_NAME_SIZE 64

#define RTE_LOGTYPE_LTHREAD RTE_LOGTYPE_USER1


/* define some shorthand for current scheduler and current thread */
#define THIS_SCHED RTE_PER_LCORE(this_sched)
#define THIS_LTHREAD RTE_PER_LCORE(this_sched)->current_lthread

/*
 * Definition of an scheduler struct
 */
struct lthread_sched {
	struct ctx ctx;					/* cpu context */
	uint64_t birth;					/* time created */
	struct lthread *current_lthread;		/* running thread */
	unsigned lcore_id;				/* this sched lcore */
	int run_flag;					/* sched shutdown */
	uint64_t nb_blocked_threads;	/* blocked threads */
	struct lthread_queue *ready;			/* local ready queue */
	struct lthread_queue *pready;			/* peer ready queue */
	struct lthread_objcache *lthread_cache;		/* free lthreads */
	struct lthread_objcache *stack_cache;		/* free stacks */
	struct lthread_objcache *per_lthread_cache;	/* free per lthread */
	struct lthread_objcache *tls_cache;		/* free TLS */
	struct lthread_objcache *cond_cache;		/* free cond vars */
	struct lthread_objcache *mutex_cache;		/* free mutexes */
	struct qnode_pool *qnode_pool;		/* pool of queue nodes */
	struct key_pool *key_pool;		/* pool of free TLS keys */
	size_t stack_size;
	uint64_t diag_ref;				/* diag ref */
} __rte_cache_aligned;

RTE_DECLARE_PER_LCORE(struct lthread_sched *, this_sched);


/*
 * State for an lthread
 */
enum lthread_st {
	ST_LT_INIT,		/* initial state */
	ST_LT_READY,		/* lthread is ready to run */
	ST_LT_SLEEPING,		/* lthread is sleeping */
	ST_LT_EXPIRED,		/* lthread timeout has expired  */
	ST_LT_EXITED,		/* lthread has exited and needs cleanup */
	ST_LT_DETACH,		/* lthread frees on exit*/
	ST_LT_CANCELLED,	/* lthread has been cancelled */
};

/*
 * lthread sub states for exit/join
 */
enum join_st {
	LT_JOIN_INITIAL,	/* initial state */
	LT_JOIN_EXITING,	/* thread is exiting */
	LT_JOIN_THREAD_SET,	/* joining thread has been set */
	LT_JOIN_EXIT_VAL_SET,	/* exiting thread has set ret val */
	LT_JOIN_EXIT_VAL_READ,	/* joining thread has collected ret val */
};

/* defnition of an lthread stack object */
struct lthread_stack {
	uint8_t stack[LTHREAD_MAX_STACK_SIZE];
	size_t stack_size;
	struct lthread_sched *root_sched;
} __rte_cache_aligned;

/*
 * Definition of an lthread
 */
struct lthread {
	struct ctx ctx;				/* cpu context */

	uint64_t state;				/* current lthread state */

	struct lthread_sched *sched;		/* current scheduler */
	void *stack;				/* ptr to actual stack */
	size_t stack_size;			/* current stack_size */
	size_t last_stack_size;			/* last yield  stack_size */
	lthread_func_t fun;			/* func ctx is running */
	void *arg;				/* func args passed to func */
	void *per_lthread_data;			/* per lthread user data */
	lthread_exit_func exit_handler;		/* called when thread exits */
	uint64_t birth;				/* time lthread was born */
	struct lthread_queue *pending_wr_queue;	/* deferred  queue to write */
	struct lthread *lt_join;		/* lthread to join on */
	uint64_t join;				/* state for joining */
	void **lt_exit_ptr;			/* exit ptr for lthread_join */
	struct lthread_sched *root_sched;	/* thread was created here*/
	struct queue_node *qnode;		/* node when in a queue */
	struct rte_timer tim;			/* sleep timer */
	struct lthread_tls *tls;		/* keys in use by the thread */
	struct lthread_stack *stack_container;	/* stack */
	char funcname[MAX_LTHREAD_NAME_SIZE];	/* thread func name */
	uint64_t diag_ref;			/* ref to user diag data */
} __rte_cache_aligned;

#endif				/* LTHREAD_INT_H */