source: roaraudio/libroar/vio_pipe.c @ 5271:09aa484b25f4

Last change on this file since 5271:09aa484b25f4 was 5270:e25346c13638, checked in by phi, 12 years ago

fixed some gcc -Wextra warnings

File size: 9.1 KB
Line 
1//vio_pipe.c:
2
3/*
4 *      Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2009-2011
5 *
6 *  This file is part of libroar a part of RoarAudio,
7 *  a cross-platform sound system for both, home and professional use.
8 *  See README for details.
9 *
10 *  This file is free software; you can redistribute it and/or modify
11 *  it under the terms of the GNU General Public License version 3
12 *  as published by the Free Software Foundation.
13 *
14 *  libroar is distributed in the hope that it will be useful,
15 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
16 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17 *  GNU General Public License for more details.
18 *
19 *  You should have received a copy of the GNU General Public License
20 *  along with this software; see the file COPYING.  If not, write to
21 *  the Free Software Foundation, 51 Franklin Street, Fifth Floor,
22 *  Boston, MA 02110-1301, USA.
23 *
24 *  NOTE for everyone want's to change something and send patches:
25 *  read README and HACKING! There a addition information on
26 *  the license of this document you need to read before you send
27 *  any patches.
28 *
29 *  NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc
30 *  or libpulse*:
31 *  The libs libroaresd, libroararts and libroarpulse link this lib
32 *  and are therefore GPL. Because of this it may be illigal to use
33 *  them with any software that uses libesd, libartsc or libpulse*.
34 */
35
36#include "libroar.h"
37
38int roar_vio_open_pipe (struct roar_vio_calls * s0, struct roar_vio_calls * s1, int type, int flags) {
39#ifndef ROAR_WITHOUT_VIO_PIPE
40 struct roar_vio_pipe * self;
41 int                    rw = flags & (O_RDONLY|O_WRONLY|O_RDWR);
42
43 if ( s0 == NULL || s1 == NULL )
44  return -1;
45
46 if ( (self = roar_mm_malloc(sizeof(struct roar_vio_pipe))) == NULL )
47  return -1;
48
49 memset(self, 0, sizeof(struct roar_vio_pipe));
50
51 self->refcount = 2;
52 self->flags    = flags;
53
54 if ( type == ROAR_VIO_PIPE_TYPE_AUTO ) {
55#ifdef ROAR_TARGET_WIN32
56  type = ROAR_VIO_PIPE_TYPE_BUFFER;
57#else
58  type = ROAR_VIO_PIPE_TYPE_SOCKET;
59#endif
60 }
61
62 self->type     = type;
63
64 switch (type) {
65  case ROAR_VIO_PIPE_TYPE_BUFFER:
66    // no buffers need to be set up here,
67    // we handle the NULL pointer in the reader and writer func
68    roar_mm_free(self);
69    return -1;
70   break;
71  case ROAR_VIO_PIPE_TYPE_PIPE:
72    self->b.p[0] = self->b.p[1] = self->b.p[2] = self->b.p[3] = -1;
73
74    if ( rw == O_RDWR || rw == O_RDONLY )
75     if ( pipe(self->b.p) == -1 ) {
76      roar_mm_free(self);
77      return -1;
78     }
79    if ( rw == O_RDWR || rw == O_WRONLY )
80     if ( pipe((self->b.p) + 2) == -1 ) {
81      close(self->b.p[0]);
82      close(self->b.p[1]);
83      roar_mm_free(self);
84      return -1;
85     }
86   break;
87#ifdef ROAR_HAVE_UNIX
88  case ROAR_VIO_PIPE_TYPE_SOCKET:
89    if ( socketpair(AF_UNIX, SOCK_STREAM, 0, self->b.p) == -1 ) {
90     roar_mm_free(self);
91     return -1;
92    }
93
94    if ( rw == O_RDONLY ) {
95     ROAR_SHUTDOWN(self->b.p[0], SHUT_WR);
96     ROAR_SHUTDOWN(self->b.p[1], SHUT_RD);
97    } else if ( rw == O_WRONLY ) {
98     ROAR_SHUTDOWN(self->b.p[0], SHUT_RD);
99     ROAR_SHUTDOWN(self->b.p[1], SHUT_WR);
100    }
101   break;
102#endif
103  default:
104    roar_mm_free(self);
105    return -1;
106 }
107
108 roar_vio_pipe_init(s0, self, flags);
109 roar_vio_pipe_init(s1, self, flags);
110
111 self->s0 = s0;
112
113 return 0;
114#else
115 return -1;
116#endif
117}
118
119#ifndef ROAR_WITHOUT_VIO_PIPE
120int roar_vio_pipe_init (struct roar_vio_calls * s,  struct roar_vio_pipe * self, int flags) {
121 if ( s == NULL || self == NULL )
122  return -1;
123
124 memset(s, 0, sizeof(struct roar_vio_calls));
125
126 s->close    = roar_vio_pipe_close;
127 s->read     = roar_vio_pipe_read;
128 s->write    = roar_vio_pipe_write;
129 s->nonblock = roar_vio_pipe_nonblock;
130 s->sync     = roar_vio_pipe_sync;
131
132 s->inst = (void*) self;
133
134 if ( flags & O_NONBLOCK ) {
135  roar_vio_pipe_nonblock(s, ROAR_SOCKET_NONBLOCK);
136 }
137
138 return 0;
139}
140
141int     roar_vio_pipe_close   (struct roar_vio_calls * vio) {
142 struct roar_vio_pipe * self;
143 int                    idx;
144
145 if ( vio == NULL )
146  return -1;
147
148 if ( (self = (struct roar_vio_pipe *)vio->inst) == NULL )
149  return -1;
150
151 self->refcount--;
152
153 switch (self->type) {
154  case ROAR_VIO_PIPE_TYPE_BUFFER:
155    // this will be a bit more complex as we need to change the flags, too.
156   break;
157  case ROAR_VIO_PIPE_TYPE_PIPE:
158   switch (ROAR_VIO_PIPE_S(self, vio)) {
159    case 0:
160      close(self->b.p[0]);
161      close(self->b.p[3]);
162      self->b.p[0] = -1;
163      self->b.p[3] = -1;
164     break;
165    case 1:
166      close(self->b.p[1]);
167      close(self->b.p[2]);
168      self->b.p[1] = -1;
169      self->b.p[2] = -1;
170     break;
171   }
172   break;
173#ifdef ROAR_HAVE_UNIX
174  case ROAR_VIO_PIPE_TYPE_SOCKET:
175    close(self->b.p[idx = ROAR_VIO_PIPE_S(self, vio)]);
176    self->b.p[idx] = -1;
177   break;
178#endif
179 }
180
181 if ( ! self->refcount ) {
182  roar_mm_free(self);
183 }
184
185 vio->inst = NULL;
186 return 0;
187}
188
189int     roar_vio_pipe_nonblock(struct roar_vio_calls * vio, int state) {
190 struct roar_vio_pipe * self;
191
192 if ( vio == NULL )
193  return -1;
194
195 if ( (self = (struct roar_vio_pipe *)vio->inst) == NULL )
196  return -1;
197
198 switch (self->type) {
199  case ROAR_VIO_PIPE_TYPE_PIPE:
200    if ( roar_socket_nonblock(self->b.p[ROAR_VIO_PIPE_S(self,vio)*2], state) == -1 )
201     return -1;
202    return roar_socket_nonblock(self->b.p[(ROAR_VIO_PIPE_SR(self,vio)*2)+1], state);
203   break;
204#ifdef ROAR_HAVE_UNIX
205  case ROAR_VIO_PIPE_TYPE_SOCKET:
206    return roar_socket_nonblock(self->b.p[ROAR_VIO_PIPE_S(self,vio)], state);
207   break;
208#endif
209 }
210
211 return -1;
212}
213
214int     roar_vio_pipe_sync    (struct roar_vio_calls * vio) {
215 // we may add fdatasync() calls here depending on the type
216 // but in general they should not be needed on pipes.
217 (void)vio;
218 return 0;
219}
220
221int     roar_vio_pipe_ctl     (struct roar_vio_calls * vio, int cmd, void * data) {
222 struct roar_vio_pipe * self;
223
224 if (vio == NULL || cmd == -1)
225  return -1;
226
227 if ( (self = (struct roar_vio_pipe *)vio->inst) == NULL )
228  return -1;
229
230 switch (cmd) {
231  case ROAR_VIO_CTL_GET_NAME:
232    if ( data == NULL )
233     return -1;
234
235    *(char**)data = "pipe";
236    return 0;
237   break;
238  case ROAR_VIO_CTL_GET_FH:
239  case ROAR_VIO_CTL_GET_SELECT_FH:
240#ifdef ROAR_HAVE_UNIX
241    if ( self->type == ROAR_VIO_PIPE_TYPE_SOCKET ) {
242     *(int*)data = self->b.p[ROAR_VIO_PIPE_S(self,vio)];
243     return 0;
244    } else {
245     return -1;
246    }
247#else
248    return -1;
249#endif
250   break;
251  case ROAR_VIO_CTL_GET_READ_FH:
252  case ROAR_VIO_CTL_GET_SELECT_READ_FH:
253    switch (self->type) {
254#ifdef ROAR_HAVE_UNIX
255     case ROAR_VIO_PIPE_TYPE_SOCKET:
256       *(int*)data = self->b.p[ROAR_VIO_PIPE_S(self,vio)];
257       return 0;
258      break;
259#endif
260     case ROAR_VIO_PIPE_TYPE_PIPE:
261       *(int*)data = self->b.p[ROAR_VIO_PIPE_S(self,vio)*2];
262       return 0;
263      break;
264    }
265  case ROAR_VIO_CTL_GET_WRITE_FH:
266  case ROAR_VIO_CTL_GET_SELECT_WRITE_FH:
267    switch (self->type) {
268#ifdef ROAR_HAVE_UNIX
269     case ROAR_VIO_PIPE_TYPE_SOCKET:
270       *(int*)data = self->b.p[ROAR_VIO_PIPE_S(self,vio)];
271       return 0;
272      break;
273#endif
274     case ROAR_VIO_PIPE_TYPE_PIPE:
275       *(int*)data = self->b.p[(ROAR_VIO_PIPE_SR(self,vio)*2)+1];
276       return 0;
277      break;
278    }
279   break;
280 }
281
282 return -1;
283}
284
285
286ssize_t roar_vio_pipe_read    (struct roar_vio_calls * vio, void *buf, size_t count) {
287 struct roar_vio_pipe * self;
288 int                    idx;
289
290 if ( vio == NULL )
291  return -1;
292
293 if ( (self = (struct roar_vio_pipe *)vio->inst) == NULL )
294  return -1;
295
296 switch (self->type) {
297  case ROAR_VIO_PIPE_TYPE_BUFFER:
298    idx = ROAR_VIO_PIPE_S(self,vio);
299
300    if ( (idx == 0 ? O_WRONLY : O_RDONLY) == (self->flags & (O_RDONLY|O_WRONLY|O_RDWR)) ) {
301     raise(SIGPIPE);
302     return -1;
303    }
304
305    if ( self->b.b[idx] == NULL )
306     return 0;
307
308    if ( roar_buffer_shift_out(&(self->b.b[idx]), buf, &count) == -1 )
309     return -1;
310
311    return count;
312   break;
313  case ROAR_VIO_PIPE_TYPE_PIPE:
314    return read(self->b.p[ROAR_VIO_PIPE_S(self,vio)*2], buf, count);
315   break;
316#ifdef ROAR_HAVE_UNIX
317  case ROAR_VIO_PIPE_TYPE_SOCKET:
318    return read(self->b.p[ROAR_VIO_PIPE_S(self,vio)], buf, count);
319   break;
320#endif
321 }
322
323 return -1;
324}
325
326ssize_t roar_vio_pipe_write   (struct roar_vio_calls * vio, void *buf, size_t count) {
327 struct roar_vio_pipe * self;
328 struct roar_buffer   * next;
329 void                 * data;
330 int                    idx;
331
332 if ( vio == NULL )
333  return -1;
334
335 if ( (self = (struct roar_vio_pipe *)vio->inst) == NULL )
336  return -1;
337
338 switch (self->type) {
339  case ROAR_VIO_PIPE_TYPE_BUFFER:
340    if ( self->refcount < 2 ) {
341     raise(SIGPIPE);
342     return -1;
343    }
344
345    idx = ROAR_VIO_PIPE_SR(self,vio);
346
347    if ( (idx == 0 ? O_WRONLY : O_RDONLY) == (self->flags & (O_RDONLY|O_WRONLY|O_RDWR)) ) {
348     raise(SIGPIPE);
349     return -1;
350    }
351
352    if ( roar_buffer_new_data(&next, count, &data) == -1 )
353     return -1;
354
355    memcpy(data, buf, count);
356
357    if ( self->b.b[idx] == NULL ) {
358     self->b.b[idx] = next;
359    } else {
360     if ( roar_buffer_add(self->b.b[idx], next) == -1 ) {
361      roar_buffer_free(next);
362      return -1;
363     }
364    }
365
366    return count;
367   break;
368  case ROAR_VIO_PIPE_TYPE_PIPE:
369    return write(self->b.p[(ROAR_VIO_PIPE_SR(self,vio)*2)+1], buf, count);
370   break;
371#ifdef ROAR_HAVE_UNIX
372  case ROAR_VIO_PIPE_TYPE_SOCKET:
373    return write(self->b.p[ROAR_VIO_PIPE_S(self,vio)], buf, count);
374   break;
375#endif
376 }
377
378 return -1;
379}
380#endif
381
382//ll
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