2 This file is part of PulseAudio.
4 Copyright 2006 Lennart Poettering
6 PulseAudio is free software; you can redistribute it and/or modify
7 it under the terms of the GNU Lesser General Public License as published
8 by the Free Software Foundation; either version 2.1 of the License,
9 or (at your option) any later version.
11 PulseAudio is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public License
17 along with PulseAudio; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
31 #include <sys/types.h>
35 #include <pulse/xmalloc.h>
36 #include <pulsecore/module.h>
37 #include <pulsecore/core.h>
38 #include <pulsecore/llist.h>
39 #include <pulsecore/core-util.h>
40 #include <pulsecore/log.h>
41 #include <pulse/mainloop-api.h>
42 #include <pulsecore/core-error.h>
43 #include <pulsecore/start-child.h>
45 #include "module-gconf-symdef.h"
47 PA_MODULE_AUTHOR("Lennart Poettering");
48 PA_MODULE_DESCRIPTION("GConf Adapter");
49 PA_MODULE_VERSION(PACKAGE_VERSION);
50 PA_MODULE_LOAD_ONCE(TRUE);
52 #define MAX_MODULES 10
64 struct module_item items[MAX_MODULES];
72 pa_hashmap *module_infos;
78 pa_io_event *io_event;
84 static int fill_buf(struct userdata *u) {
88 if (u->buf_fill >= BUF_MAX) {
89 pa_log("read buffer overflow");
93 if ((r = pa_read(u->fd, u->buf + u->buf_fill, BUF_MAX - u->buf_fill, &u->fd_type)) <= 0)
96 u->buf_fill += (size_t) r;
100 static int read_byte(struct userdata *u) {
109 pa_assert(u->buf_fill > 0);
111 memmove(u->buf, u->buf+1, u->buf_fill);
115 static char *read_string(struct userdata *u) {
121 if ((e = memchr(u->buf, 0, u->buf_fill))) {
122 char *ret = pa_xstrdup(u->buf);
123 u->buf_fill -= (size_t) (e - u->buf +1);
124 memmove(u->buf, e+1, u->buf_fill);
133 static void unload_one_module(struct userdata *u, struct module_info*m, unsigned i) {
136 pa_assert(i < m->n_items);
138 if (m->items[i].index == PA_INVALID_INDEX)
141 pa_log_debug("Unloading module #%i", m->items[i].index);
142 pa_module_unload_by_index(u->core, m->items[i].index, TRUE);
143 m->items[i].index = PA_INVALID_INDEX;
144 pa_xfree(m->items[i].name);
145 pa_xfree(m->items[i].args);
146 m->items[i].name = m->items[i].args = NULL;
149 static void unload_all_modules(struct userdata *u, struct module_info*m) {
155 for (i = 0; i < m->n_items; i++)
156 unload_one_module(u, m, i);
161 static void load_module(
163 struct module_info *m,
177 if (m->items[i].index != PA_INVALID_INDEX &&
178 strcmp(m->items[i].name, name) == 0 &&
179 strcmp(m->items[i].args, args) == 0)
182 unload_one_module(u, m, i);
185 pa_log_debug("Loading module '%s' with args '%s' due to GConf configuration.", name, args);
187 m->items[i].name = pa_xstrdup(name);
188 m->items[i].args = pa_xstrdup(args);
189 m->items[i].index = PA_INVALID_INDEX;
191 if (!(mod = pa_module_load(u->core, name, args))) {
192 pa_log("pa_module_load() failed");
196 m->items[i].index = mod->index;
199 static void module_info_free(void *p, void *userdata) {
200 struct module_info *m = p;
201 struct userdata *u = userdata;
206 unload_all_modules(u, m);
211 static int handle_event(struct userdata *u) {
216 if ((opcode = read_byte(u)) < 0){
217 if (errno == EINTR || errno == EAGAIN)
224 /* The helper tool is now initialized */
230 struct module_info *m;
233 if (!(name = read_string(u)))
236 if (!(m = pa_hashmap_get(u->module_infos, name))) {
237 m = pa_xnew(struct module_info, 1);
240 pa_hashmap_put(u->module_infos, m->name, m);
245 while (i < MAX_MODULES) {
248 if (!(module = read_string(u))) {
249 if (i > m->n_items) m->n_items = i;
258 if (!(args = read_string(u))) {
261 if (i > m->n_items) m->n_items = i;
265 load_module(u, m, i, module, args, i >= m->n_items);
273 /* Unload all removed modules */
274 for (j = i; j < m->n_items; j++)
275 unload_one_module(u, m, j);
284 struct module_info *m;
286 if (!(name = read_string(u)))
289 if ((m = pa_hashmap_get(u->module_infos, name))) {
290 pa_hashmap_remove(u->module_infos, name);
291 module_info_free(m, u);
299 } while (u->buf_fill > 0 && ret == 0);
304 pa_log("Unable to read or parse data from client.");
308 static void io_event_cb(
312 pa_io_event_flags_t events,
315 struct userdata *u = userdata;
317 if (handle_event(u) < 0) {
320 u->core->mainloop->io_free(u->io_event);
324 pa_module_unload_request(u->module, TRUE);
328 int pa__init(pa_module*m) {
332 u = pa_xnew(struct userdata, 1);
336 u->module_infos = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);
343 if ((u->fd = pa_start_child_for_read(
344 #if defined(__linux__) && !defined(__OPTIMIZE__)
345 pa_run_from_build_tree() ? PA_BUILDDIR "/gconf-helper" :
347 PA_GCONF_HELPER, NULL, &u->pid)) < 0)
350 u->io_event = m->core->mainloop->io_new(
358 if ((r = handle_event(u)) < 0)
361 /* Read until the client signalled us that it is ready with
372 void pa__done(pa_module*m) {
377 if (!(u = m->userdata))
380 if (u->pid != (pid_t) -1) {
381 kill(u->pid, SIGTERM);
384 if (waitpid(u->pid, NULL, 0) >= 0)
387 if (errno != EINTR) {
388 pa_log("waitpid() failed: %s", pa_cstrerror(errno));
395 m->core->mainloop->io_free(u->io_event);
401 pa_hashmap_free(u->module_infos, module_info_free, u);