PipeWire  0.3.59
system.h
Go to the documentation of this file.
1 /* Simple Plugin API
2  *
3  * Copyright © 2019 Wim Taymans
4  *
5  * Permission is hereby granted, free of charge, to any person obtaining a
6  * copy of this software and associated documentation files (the "Software"),
7  * to deal in the Software without restriction, including without limitation
8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9  * and/or sell copies of the Software, and to permit persons to whom the
10  * Software is furnished to do so, subject to the following conditions:
11  *
12  * The above copyright notice and this permission notice (including the next
13  * paragraph) shall be included in all copies or substantial portions of the
14  * Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22  * DEALINGS IN THE SOFTWARE.
23  */
24 
25 #ifndef SPA_SYSTEM_H
26 #define SPA_SYSTEM_H
27 
28 #ifdef __cplusplus
29 extern "C" {
30 #endif
31 
32 struct itimerspec;
33 
34 #include <time.h>
35 #include <sys/types.h>
36 
37 #include <spa/utils/defs.h>
38 #include <spa/utils/hook.h>
39 
52 #define SPA_TYPE_INTERFACE_System SPA_TYPE_INFO_INTERFACE_BASE "System"
53 #define SPA_TYPE_INTERFACE_DataSystem SPA_TYPE_INFO_INTERFACE_BASE "DataSystem"
54 
55 #define SPA_VERSION_SYSTEM 0
56 struct spa_system { struct spa_interface iface; };
57 
58 /* IO events */
59 #define SPA_IO_IN (1 << 0)
60 #define SPA_IO_OUT (1 << 2)
61 #define SPA_IO_ERR (1 << 3)
62 #define SPA_IO_HUP (1 << 4)
63 
64 /* flags */
65 #define SPA_FD_CLOEXEC (1<<0)
66 #define SPA_FD_NONBLOCK (1<<1)
67 #define SPA_FD_EVENT_SEMAPHORE (1<<2)
68 #define SPA_FD_TIMER_ABSTIME (1<<3)
69 #define SPA_FD_TIMER_CANCEL_ON_SET (1<<4)
70 
72  uint32_t events;
73  void *data;
74 };
75 
76 struct spa_system_methods {
77 #define SPA_VERSION_SYSTEM_METHODS 0
78  uint32_t version;
79 
80  /* read/write/ioctl */
81  ssize_t (*read) (void *object, int fd, void *buf, size_t count);
82  ssize_t (*write) (void *object, int fd, const void *buf, size_t count);
83  int (*ioctl) (void *object, int fd, unsigned long request, ...);
84  int (*close) (void *object, int fd);
85 
86  /* clock */
87  int (*clock_gettime) (void *object,
88  int clockid, struct timespec *value);
89  int (*clock_getres) (void *object,
90  int clockid, struct timespec *res);
91 
92  /* poll */
93  int (*pollfd_create) (void *object, int flags);
94  int (*pollfd_add) (void *object, int pfd, int fd, uint32_t events, void *data);
95  int (*pollfd_mod) (void *object, int pfd, int fd, uint32_t events, void *data);
96  int (*pollfd_del) (void *object, int pfd, int fd);
97  int (*pollfd_wait) (void *object, int pfd,
98  struct spa_poll_event *ev, int n_ev, int timeout);
99 
100  /* timers */
101  int (*timerfd_create) (void *object, int clockid, int flags);
102  int (*timerfd_settime) (void *object,
103  int fd, int flags,
104  const struct itimerspec *new_value,
105  struct itimerspec *old_value);
106  int (*timerfd_gettime) (void *object,
107  int fd, struct itimerspec *curr_value);
108  int (*timerfd_read) (void *object, int fd, uint64_t *expirations);
109 
110  /* events */
111  int (*eventfd_create) (void *object, int flags);
112  int (*eventfd_write) (void *object, int fd, uint64_t count);
113  int (*eventfd_read) (void *object, int fd, uint64_t *count);
114 
115  /* signals */
116  int (*signalfd_create) (void *object, int signal, int flags);
117  int (*signalfd_read) (void *object, int fd, int *signal);
118 };
119 
120 #define spa_system_method_r(o,method,version,...) \
121 ({ \
122  volatile int _res = -ENOTSUP; \
123  struct spa_system *_o = o; \
124  spa_interface_call_res(&_o->iface, \
125  struct spa_system_methods, _res, \
126  method, version, ##__VA_ARGS__); \
127  _res; \
128 })
129 
130 
131 #define spa_system_read(s,...) spa_system_method_r(s,read,0,__VA_ARGS__)
132 #define spa_system_write(s,...) spa_system_method_r(s,write,0,__VA_ARGS__)
133 #define spa_system_ioctl(s,...) spa_system_method_r(s,ioctl,0,__VA_ARGS__)
134 #define spa_system_close(s,...) spa_system_method_r(s,close,0,__VA_ARGS__)
135 
136 #define spa_system_clock_gettime(s,...) spa_system_method_r(s,clock_gettime,0,__VA_ARGS__)
137 #define spa_system_clock_getres(s,...) spa_system_method_r(s,clock_getres,0,__VA_ARGS__)
138 
139 #define spa_system_pollfd_create(s,...) spa_system_method_r(s,pollfd_create,0,__VA_ARGS__)
140 #define spa_system_pollfd_add(s,...) spa_system_method_r(s,pollfd_add,0,__VA_ARGS__)
141 #define spa_system_pollfd_mod(s,...) spa_system_method_r(s,pollfd_mod,0,__VA_ARGS__)
142 #define spa_system_pollfd_del(s,...) spa_system_method_r(s,pollfd_del,0,__VA_ARGS__)
143 #define spa_system_pollfd_wait(s,...) spa_system_method_r(s,pollfd_wait,0,__VA_ARGS__)
144 
145 #define spa_system_timerfd_create(s,...) spa_system_method_r(s,timerfd_create,0,__VA_ARGS__)
146 #define spa_system_timerfd_settime(s,...) spa_system_method_r(s,timerfd_settime,0,__VA_ARGS__)
147 #define spa_system_timerfd_gettime(s,...) spa_system_method_r(s,timerfd_gettime,0,__VA_ARGS__)
148 #define spa_system_timerfd_read(s,...) spa_system_method_r(s,timerfd_read,0,__VA_ARGS__)
149 
150 #define spa_system_eventfd_create(s,...) spa_system_method_r(s,eventfd_create,0,__VA_ARGS__)
151 #define spa_system_eventfd_write(s,...) spa_system_method_r(s,eventfd_write,0,__VA_ARGS__)
152 #define spa_system_eventfd_read(s,...) spa_system_method_r(s,eventfd_read,0,__VA_ARGS__)
153 
154 #define spa_system_signalfd_create(s,...) spa_system_method_r(s,signalfd_create,0,__VA_ARGS__)
155 #define spa_system_signalfd_read(s,...) spa_system_method_r(s,signalfd_read,0,__VA_ARGS__)
156 
161 #ifdef __cplusplus
162 } /* extern "C" */
163 #endif
164 
165 #endif /* SPA_SYSTEM_H */
spa/utils/defs.h
spa/utils/hook.h
Definition: hook.h:158
Definition: system.h:89
uint32_t events
Definition: system.h:90
void * data
Definition: system.h:91
Definition: system.h:94
int(* pollfd_del)(void *object, int pfd, int fd)
Definition: system.h:115
int(* eventfd_read)(void *object, int fd, uint64_t *count)
Definition: system.h:132
int(* signalfd_read)(void *object, int fd, int *signal)
Definition: system.h:136
int(* pollfd_wait)(void *object, int pfd, struct spa_poll_event *ev, int n_ev, int timeout)
Definition: system.h:116
int(* timerfd_create)(void *object, int clockid, int flags)
Definition: system.h:120
int(* eventfd_write)(void *object, int fd, uint64_t count)
Definition: system.h:131
int(* eventfd_create)(void *object, int flags)
Definition: system.h:130
ssize_t(* read)(void *object, int fd, void *buf, size_t count)
Definition: system.h:100
uint32_t version
Definition: system.h:97
int(* clock_getres)(void *object, int clockid, struct timespec *res)
Definition: system.h:108
int(* timerfd_read)(void *object, int fd, uint64_t *expirations)
Definition: system.h:127
int(* close)(void *object, int fd)
Definition: system.h:103
int(* pollfd_create)(void *object, int flags)
Definition: system.h:112
int(* clock_gettime)(void *object, int clockid, struct timespec *value)
Definition: system.h:106
ssize_t(* write)(void *object, int fd, const void *buf, size_t count)
Definition: system.h:101
int(* pollfd_add)(void *object, int pfd, int fd, uint32_t events, void *data)
Definition: system.h:113
int(* timerfd_gettime)(void *object, int fd, struct itimerspec *curr_value)
Definition: system.h:125
int(* signalfd_create)(void *object, int signal, int flags)
Definition: system.h:135
int(* timerfd_settime)(void *object, int fd, int flags, const struct itimerspec *new_value, struct itimerspec *old_value)
Definition: system.h:121
int(* pollfd_mod)(void *object, int pfd, int fd, uint32_t events, void *data)
Definition: system.h:114
int(* ioctl)(void *object, int fd, unsigned long request,...)
Definition: system.h:102
Definition: system.h:65
struct spa_interface iface
Definition: system.h:65