1 /*
2 * Copyright (c) 2014 DeNA Co., Ltd.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a copy
5 * of this software and associated documentation files (the "Software"), to
6 * deal in the Software without restriction, including without limitation the
7 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
8 * sell copies of the Software, and to permit persons to whom the Software is
9 * furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
19 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
20 * IN THE SOFTWARE.
21 */
22 #ifndef h2o__evloop_h
23 #define h2o__evloop_h
24
25 #include "h2o/linklist.h"
26 #include "h2o/timerwheel.h"
27
28 #define H2O_SOCKET_FLAG_IS_DISPOSED 0x1
29 #define H2O_SOCKET_FLAG_IS_READ_READY 0x2
30 #define H2O_SOCKET_FLAG_IS_WRITE_NOTIFY 0x4
31 #define H2O_SOCKET_FLAG_IS_POLLED_FOR_READ 0x8
32 #define H2O_SOCKET_FLAG_IS_POLLED_FOR_WRITE 0x10
33 #define H2O_SOCKET_FLAG_DONT_READ 0x20
34 #define H2O_SOCKET_FLAG_IS_CONNECTING 0x40
35 #define H2O_SOCKET_FLAG_IS_ACCEPTED_CONNECTION 0x80
36 #define H2O_SOCKET_FLAG__EPOLL_IS_REGISTERED 0x1000
37
38 typedef struct st_h2o_evloop_t {
39 struct st_h2o_evloop_socket_t *_pending_as_client;
40 struct st_h2o_evloop_socket_t *_pending_as_server;
41 struct {
42 struct st_h2o_evloop_socket_t *head;
43 struct st_h2o_evloop_socket_t **tail_ref;
44 } _statechanged;
45 uint64_t _now_millisec;
46 uint64_t _now_nanosec;
47 struct timeval _tv_at;
48 h2o_timerwheel_t *_timeouts;
49 h2o_sliding_counter_t exec_time_nanosec_counter;
50 } h2o_evloop_t;
51
52 typedef h2o_evloop_t h2o_loop_t;
53
54 typedef h2o_timerwheel_entry_t h2o_timer_t;
55 typedef h2o_timerwheel_cb h2o_timer_cb;
56
57 h2o_socket_t *h2o_evloop_socket_create(h2o_evloop_t *loop, int fd, int flags);
58 h2o_socket_t *h2o_evloop_socket_accept(h2o_socket_t *listener);
59 /**
60 * Sets number of bytes that can be read at once (default: 1MB).
61 */
62 void h2o_evloop_socket_set_max_read_size(h2o_socket_t *sock, size_t max_size);
63
64 h2o_evloop_t *h2o_evloop_create(void);
65 void h2o_evloop_destroy(h2o_evloop_t *loop);
66 /**
67 * runs a event loop once. The function returns 0 if successful, or -1 if it aborts the operation due to a system call returning an
68 * error (typcially due to an interrupt setting errno to EINTR). When an error is returned, the application can consult errno and
69 * rerun the event loop.
70 */
71 int h2o_evloop_run(h2o_evloop_t *loop, int32_t max_wait);
72
73 #define h2o_timer_init h2o_timerwheel_init_entry
74 #define h2o_timer_is_linked h2o_timerwheel_is_linked
75 static void h2o_timer_link(h2o_evloop_t *loop, uint64_t delay_ticks, h2o_timer_t *timer);
76 #define h2o_timer_unlink h2o_timerwheel_unlink
77
78 /* inline definitions */
79
h2o_gettimeofday(h2o_evloop_t * loop)80 static inline struct timeval h2o_gettimeofday(h2o_evloop_t *loop)
81 {
82 return loop->_tv_at;
83 }
84
h2o_now(h2o_evloop_t * loop)85 static inline uint64_t h2o_now(h2o_evloop_t *loop)
86 {
87 return loop->_now_millisec;
88 }
89
h2o_now_nanosec(h2o_evloop_t * loop)90 static inline uint64_t h2o_now_nanosec(h2o_evloop_t *loop)
91 {
92 return loop->_now_nanosec;
93 }
94
h2o_evloop_get_execution_time_millisec(h2o_evloop_t * loop)95 static inline uint64_t h2o_evloop_get_execution_time_millisec(h2o_evloop_t *loop)
96 {
97 return loop->exec_time_nanosec_counter.average / 1000000;
98 }
99
h2o_evloop_get_execution_time_nanosec(h2o_evloop_t * loop)100 static inline uint64_t h2o_evloop_get_execution_time_nanosec(h2o_evloop_t *loop)
101 {
102 return loop->exec_time_nanosec_counter.average;
103 }
104
h2o_timer_link(h2o_evloop_t * loop,uint64_t delay_ticks,h2o_timer_t * timer)105 inline void h2o_timer_link(h2o_evloop_t *loop, uint64_t delay_ticks, h2o_timer_t *timer)
106 {
107 h2o_timerwheel_link_abs(loop->_timeouts, timer, loop->_now_millisec + delay_ticks);
108 }
109
110 #endif
111