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loop.h
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1/* Simple Plugin API */
2/* SPDX-FileCopyrightText: Copyright © 2018 Wim Taymans */
3/* SPDX-License-Identifier: MIT */
4
5#ifndef SPA_LOOP_H
6#define SPA_LOOP_H
7
8#ifdef __cplusplus
9 extern "C" {
10#endif
11
12#include <spa/utils/defs.h>
13#include <spa/utils/hook.h>
14#include <spa/support/system.h>
15
25#define SPA_TYPE_INTERFACE_Loop SPA_TYPE_INFO_INTERFACE_BASE "Loop"
26#define SPA_TYPE_INTERFACE_DataLoop SPA_TYPE_INFO_INTERFACE_BASE "DataLoop"
27#define SPA_VERSION_LOOP 0
28 struct spa_loop { struct spa_interface iface; };
29
30#define SPA_TYPE_INTERFACE_LoopControl SPA_TYPE_INFO_INTERFACE_BASE "LoopControl"
31#define SPA_VERSION_LOOP_CONTROL 1
32 struct spa_loop_control { struct spa_interface iface; };
33
34#define SPA_TYPE_INTERFACE_LoopUtils SPA_TYPE_INFO_INTERFACE_BASE "LoopUtils"
35#define SPA_VERSION_LOOP_UTILS 0
36 struct spa_loop_utils { struct spa_interface iface; };
37
38 struct spa_source;
39
40 typedef void (*spa_source_func_t) (struct spa_source *source);
41
42 struct spa_source {
43 struct spa_loop *loop;
44 spa_source_func_t func;
45 void *data;
46 int fd;
47 uint32_t mask;
48 uint32_t rmask;
49 /* private data for the loop implementer */
50 void *priv;
51};
52
53 typedef int (*spa_invoke_func_t) (struct spa_loop *loop,
54 bool async,
55 uint32_t seq,
56 const void *data,
57 size_t size,
58 void *user_data);
59
63 struct spa_loop_methods {
64 /* the version of this structure. This can be used to expand this
65 * structure in the future */
66#define SPA_VERSION_LOOP_METHODS 0
67 uint32_t version;
68
75 int (*add_source) (void *object,
76 struct spa_source *source);
77
84 int (*update_source) (void *object,
85 struct spa_source *source);
86
93 int (*remove_source) (void *object,
94 struct spa_source *source);
95
119 int (*invoke) (void *object,
120 spa_invoke_func_t func,
121 uint32_t seq,
122 const void *data,
123 size_t size,
124 bool block,
125 void *user_data);
126};
127
128#define spa_loop_method(o,method,version,...) \
129({ \
130 int _res = -ENOTSUP; \
131 struct spa_loop *_o = o; \
132 spa_interface_call_res(&_o->iface, \
133 struct spa_loop_methods, _res, \
134 method, version, ##__VA_ARGS__); \
135 _res; \
136})
137
138#define spa_loop_add_source(l,...) spa_loop_method(l,add_source,0,##__VA_ARGS__)
139#define spa_loop_update_source(l,...) spa_loop_method(l,update_source,0,##__VA_ARGS__)
140#define spa_loop_remove_source(l,...) spa_loop_method(l,remove_source,0,##__VA_ARGS__)
141#define spa_loop_invoke(l,...) spa_loop_method(l,invoke,0,##__VA_ARGS__)
142
143
147 struct spa_loop_control_hooks {
148#define SPA_VERSION_LOOP_CONTROL_HOOKS 0
149 uint32_t version;
152 void (*before) (void *data);
155 void (*after) (void *data);
156};
157
158#define spa_loop_control_hook_before(l) \
159({ \
160 struct spa_hook_list *_l = l; \
161 struct spa_hook *_h; \
162 spa_list_for_each_reverse(_h, &_l->list, link) \
163 spa_callbacks_call_fast(&_h->cb, struct spa_loop_control_hooks, before, 0); \
164})
165
166#define spa_loop_control_hook_after(l) \
167({ \
168 struct spa_hook_list *_l = l; \
169 struct spa_hook *_h; \
170 spa_list_for_each(_h, &_l->list, link) \
171 spa_callbacks_call_fast(&_h->cb, struct spa_loop_control_hooks, after, 0); \
172})
173
177 struct spa_loop_control_methods {
178 /* the version of this structure. This can be used to expand this
179 * structure in the future */
180#define SPA_VERSION_LOOP_CONTROL_METHODS 1
181 uint32_t version;
182
183 int (*get_fd) (void *object);
184
191 void (*add_hook) (void *object,
192 struct spa_hook *hook,
193 const struct spa_loop_control_hooks *hooks,
194 void *data);
195
203 void (*enter) (void *object);
210 void (*leave) (void *object);
211
221 int (*iterate) (void *object, int timeout);
222
231 int (*check) (void *object);
232};
233
234#define spa_loop_control_method_v(o,method,version,...) \
235({ \
236 struct spa_loop_control *_o = o; \
237 spa_interface_call(&_o->iface, \
238 struct spa_loop_control_methods, \
239 method, version, ##__VA_ARGS__); \
240})
241
242#define spa_loop_control_method_r(o,method,version,...) \
243({ \
244 int _res = -ENOTSUP; \
245 struct spa_loop_control *_o = o; \
246 spa_interface_call_res(&_o->iface, \
247 struct spa_loop_control_methods, _res, \
248 method, version, ##__VA_ARGS__); \
249 _res; \
250})
251
252#define spa_loop_control_method_fast_r(o,method,version,...) \
253({ \
254 int _res; \
255 struct spa_loop_control *_o = o; \
256 spa_interface_call_fast_res(&_o->iface, \
257 struct spa_loop_control_methods, _res, \
258 method, version, ##__VA_ARGS__); \
259 _res; \
260})
261
262#define spa_loop_control_get_fd(l) spa_loop_control_method_r(l,get_fd,0)
263#define spa_loop_control_add_hook(l,...) spa_loop_control_method_v(l,add_hook,0,__VA_ARGS__)
264#define spa_loop_control_enter(l) spa_loop_control_method_v(l,enter,0)
265#define spa_loop_control_leave(l) spa_loop_control_method_v(l,leave,0)
266#define spa_loop_control_iterate(l,...) spa_loop_control_method_r(l,iterate,0,__VA_ARGS__)
267#define spa_loop_control_check(l) spa_loop_control_method_r(l,check,1)
268
269#define spa_loop_control_iterate_fast(l,...) spa_loop_control_method_fast_r(l,iterate,0,__VA_ARGS__)
270
271 typedef void (*spa_source_io_func_t) (void *data, int fd, uint32_t mask);
272 typedef void (*spa_source_idle_func_t) (void *data);
273 typedef void (*spa_source_event_func_t) (void *data, uint64_t count);
274 typedef void (*spa_source_timer_func_t) (void *data, uint64_t expirations);
275 typedef void (*spa_source_signal_func_t) (void *data, int signal_number);
276
280 struct spa_loop_utils_methods {
281 /* the version of this structure. This can be used to expand this
282 * structure in the future */
283#define SPA_VERSION_LOOP_UTILS_METHODS 0
284 uint32_t version;
285
286 struct spa_source *(*add_io) (void *object,
287 int fd,
288 uint32_t mask,
289 bool close,
290 spa_source_io_func_t func, void *data);
291
292 int (*update_io) (void *object, struct spa_source *source, uint32_t mask);
293
294 struct spa_source *(*add_idle) (void *object,
295 bool enabled,
296 spa_source_idle_func_t func, void *data);
297 int (*enable_idle) (void *object, struct spa_source *source, bool enabled);
298
299 struct spa_source *(*add_event) (void *object,
300 spa_source_event_func_t func, void *data);
301 int (*signal_event) (void *object, struct spa_source *source);
302
303 struct spa_source *(*add_timer) (void *object,
304 spa_source_timer_func_t func, void *data);
305 int (*update_timer) (void *object,
306 struct spa_source *source,
307 struct timespec *value,
308 struct timespec *interval,
309 bool absolute);
310 struct spa_source *(*add_signal) (void *object,
311 int signal_number,
312 spa_source_signal_func_t func, void *data);
313
317 void (*destroy_source) (void *object, struct spa_source *source);
318};
319
320#define spa_loop_utils_method_v(o,method,version,...) \
321({ \
322 struct spa_loop_utils *_o = o; \
323 spa_interface_call(&_o->iface, \
324 struct spa_loop_utils_methods, \
325 method, version, ##__VA_ARGS__); \
326})
327
328#define spa_loop_utils_method_r(o,method,version,...) \
329({ \
330 int _res = -ENOTSUP; \
331 struct spa_loop_utils *_o = o; \
332 spa_interface_call_res(&_o->iface, \
333 struct spa_loop_utils_methods, _res, \
334 method, version, ##__VA_ARGS__); \
335 _res; \
336})
337#define spa_loop_utils_method_s(o,method,version,...) \
338({ \
339 struct spa_source *_res = NULL; \
340 struct spa_loop_utils *_o = o; \
341 spa_interface_call_res(&_o->iface, \
342 struct spa_loop_utils_methods, _res, \
343 method, version, ##__VA_ARGS__); \
344 _res; \
345})
346
347
348#define spa_loop_utils_add_io(l,...) spa_loop_utils_method_s(l,add_io,0,__VA_ARGS__)
349#define spa_loop_utils_update_io(l,...) spa_loop_utils_method_r(l,update_io,0,__VA_ARGS__)
350#define spa_loop_utils_add_idle(l,...) spa_loop_utils_method_s(l,add_idle,0,__VA_ARGS__)
351#define spa_loop_utils_enable_idle(l,...) spa_loop_utils_method_r(l,enable_idle,0,__VA_ARGS__)
352#define spa_loop_utils_add_event(l,...) spa_loop_utils_method_s(l,add_event,0,__VA_ARGS__)
353#define spa_loop_utils_signal_event(l,...) spa_loop_utils_method_r(l,signal_event,0,__VA_ARGS__)
354#define spa_loop_utils_add_timer(l,...) spa_loop_utils_method_s(l,add_timer,0,__VA_ARGS__)
355#define spa_loop_utils_update_timer(l,...) spa_loop_utils_method_r(l,update_timer,0,__VA_ARGS__)
356#define spa_loop_utils_add_signal(l,...) spa_loop_utils_method_s(l,add_signal,0,__VA_ARGS__)
357#define spa_loop_utils_destroy_source(l,...) spa_loop_utils_method_v(l,destroy_source,0,__VA_ARGS__)
358
363#ifdef __cplusplus
364} /* extern "C" */
365#endif
366
367#endif /* SPA_LOOP_H */
defs.h
spa/utils/defs.h
spa_source_timer_func_t
void(* spa_source_timer_func_t)(void *data, uint64_t expirations)
Definition loop.h:310
spa_source_event_func_t
void(* spa_source_event_func_t)(void *data, uint64_t count)
Definition loop.h:309
spa_source_signal_func_t
void(* spa_source_signal_func_t)(void *data, int signal_number)
Definition loop.h:311
spa_source_idle_func_t
void(* spa_source_idle_func_t)(void *data)
Definition loop.h:308
spa_source_func_t
void(* spa_source_func_t)(struct spa_source *source)
Definition loop.h:53
spa_invoke_func_t
int(* spa_invoke_func_t)(struct spa_loop *loop, bool async, uint32_t seq, const void *data, size_t size, void *user_data)
Definition loop.h:66
spa_source_io_func_t
void(* spa_source_io_func_t)(void *data, int fd, uint32_t mask)
Definition loop.h:307
hook.h
spa/utils/hook.h
spa_hook
A hook, contains the structure with functions and the data passed to the functions.
Definition hook.h:350
spa_interface
Definition hook.h:138
spa_loop_control_hooks
Control hooks.
Definition loop.h:169
spa_loop_control_hooks::before
void(* before)(void *data)
Executed right before waiting for events.
Definition loop.h:175
spa_loop_control_hooks::version
uint32_t version
Definition loop.h:172
spa_loop_control_hooks::after
void(* after)(void *data)
Executed right after waiting for events.
Definition loop.h:178
spa_loop_control_methods
Control an event loop.
Definition loop.h:200
spa_loop_control_methods::get_fd
int(* get_fd)(void *object)
Definition loop.h:207
spa_loop_control_methods::iterate
int(* iterate)(void *object, int timeout)
Perform one iteration of the loop.
Definition loop.h:245
spa_loop_control_methods::enter
void(* enter)(void *object)
Enter a loop.
Definition loop.h:227
spa_loop_control_methods::add_hook
void(* add_hook)(void *object, struct spa_hook *hook, const struct spa_loop_control_hooks *hooks, void *data)
Add a hook.
Definition loop.h:215
spa_loop_control_methods::check
int(* check)(void *object)
Check context of the loop.
Definition loop.h:255
spa_loop_control_methods::leave
void(* leave)(void *object)
Leave a loop.
Definition loop.h:234
spa_loop_control_methods::version
uint32_t version
Definition loop.h:205
spa_loop_control
Definition loop.h:42
spa_loop_control::iface
struct spa_interface iface
Definition loop.h:42
spa_loop_methods
Register sources and work items to an event loop.
Definition loop.h:76
spa_loop_methods::add_source
int(* add_source)(void *object, struct spa_source *source)
Add a source to the loop.
Definition loop.h:89
spa_loop_methods::remove_source
int(* remove_source)(void *object, struct spa_source *source)
Remove a source from the loop.
Definition loop.h:107
spa_loop_methods::invoke
int(* invoke)(void *object, spa_invoke_func_t func, uint32_t seq, const void *data, size_t size, bool block, void *user_data)
Invoke a function in the context of this loop.
Definition loop.h:133
spa_loop_methods::update_source
int(* update_source)(void *object, struct spa_source *source)
Update the source io mask.
Definition loop.h:98
spa_loop_methods::version
uint32_t version
Definition loop.h:81
spa_loop_utils_methods
Create sources for an event loop.
Definition loop.h:316
spa_loop_utils_methods::update_io
int(* update_io)(void *object, struct spa_source *source, uint32_t mask)
Definition loop.h:329
spa_loop_utils_methods::enable_idle
int(* enable_idle)(void *object, struct spa_source *source, bool enabled)
Definition loop.h:334
spa_loop_utils_methods::signal_event
int(* signal_event)(void *object, struct spa_source *source)
Definition loop.h:338
spa_loop_utils_methods::update_timer
int(* update_timer)(void *object, struct spa_source *source, struct timespec *value, struct timespec *interval, bool absolute)
Definition loop.h:342
spa_loop_utils_methods::destroy_source
void(* destroy_source)(void *object, struct spa_source *source)
destroy a source allocated with this interface.
Definition loop.h:354
spa_loop_utils_methods::version
uint32_t version
Definition loop.h:321
spa_loop_utils
Definition loop.h:48
spa_loop_utils::iface
struct spa_interface iface
Definition loop.h:48
spa_loop
Definition loop.h:36
spa_loop::iface
struct spa_interface iface
Definition loop.h:36
spa_source
Definition loop.h:55
spa_source::rmask
uint32_t rmask
Definition loop.h:61
spa_source::data
void * data
Definition loop.h:58
spa_source::priv
void * priv
Definition loop.h:63
spa_source::mask
uint32_t mask
Definition loop.h:60
spa_source::func
spa_source_func_t func
Definition loop.h:57
spa_source::fd
int fd
Definition loop.h:59
spa_source::loop
struct spa_loop * loop
Definition loop.h:56
system.h
spa/support/system.h