From e205b25d65ccb380fa158711e24d55b6de5d9bc1 Mon Sep 17 00:00:00 2001 From: Pierre Ossman Date: Thu, 16 Feb 2006 19:19:58 +0000 Subject: Reorganised the source tree. We now have src/ with a couple of subdirs: * daemon/ - Contains the files specific to the polypaudio daemon. * modules/ - All loadable modules. * polyp/ - Files that are part of the public, application interface or are only used in libpolyp. * polypcore/ - All other shared files. * tests/ - Test programs. * utils/ - Utility programs. git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@487 fefdeb5f-60dc-0310-8127-8f9354f1896f --- src/polypcore/module.c | 275 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 275 insertions(+) create mode 100644 src/polypcore/module.c (limited to 'src/polypcore/module.c') diff --git a/src/polypcore/module.c b/src/polypcore/module.c new file mode 100644 index 00000000..499ea299 --- /dev/null +++ b/src/polypcore/module.c @@ -0,0 +1,275 @@ +/* $Id$ */ + +/*** + This file is part of polypaudio. + + polypaudio is free software; you can redistribute it and/or modify + it under the terms of the GNU Lesser General Public License as published + by the Free Software Foundation; either version 2 of the License, + or (at your option) any later version. + + polypaudio is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with polypaudio; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 + USA. +***/ + +#ifdef HAVE_CONFIG_H +#include +#endif + +#include +#include +#include +#include +#include +#include + +#include "module.h" +#include "xmalloc.h" +#include "subscribe.h" +#include "log.h" +#include "util.h" + +#define PA_SYMBOL_INIT "pa__init" +#define PA_SYMBOL_DONE "pa__done" + +#define UNLOAD_POLL_TIME 2 + +static void timeout_callback(pa_mainloop_api *m, pa_time_event*e, PA_GCC_UNUSED const struct timeval *tv, void *userdata) { + pa_core *c = userdata; + struct timeval ntv; + assert(c && c->mainloop == m && c->module_auto_unload_event == e); + + pa_module_unload_unused(c); + + pa_gettimeofday(&ntv); + ntv.tv_sec += UNLOAD_POLL_TIME; + m->time_restart(e, &ntv); +} + +pa_module* pa_module_load(pa_core *c, const char *name, const char *argument) { + pa_module *m = NULL; + int r; + + assert(c && name); + + if (c->disallow_module_loading) + goto fail; + + m = pa_xmalloc(sizeof(pa_module)); + + m->name = pa_xstrdup(name); + m->argument = pa_xstrdup(argument); + + if (!(m->dl = lt_dlopenext(name))) { + pa_log(__FILE__": Failed to open module \"%s\": %s\n", name, lt_dlerror()); + goto fail; + } + + if (!(m->init = (int (*)(pa_core *_c, pa_module*_m)) lt_dlsym(m->dl, PA_SYMBOL_INIT))) { + pa_log(__FILE__": Failed to load module \"%s\": symbol \""PA_SYMBOL_INIT"\" not found.\n", name); + goto fail; + } + + if (!(m->done = (void (*)(pa_core *_c, pa_module*_m)) lt_dlsym(m->dl, PA_SYMBOL_DONE))) { + pa_log(__FILE__": Failed to load module \"%s\": symbol \""PA_SYMBOL_DONE"\" not found.\n", name); + goto fail; + } + + m->userdata = NULL; + m->core = c; + m->n_used = -1; + m->auto_unload = 0; + m->unload_requested = 0; + + assert(m->init); + if (m->init(c, m) < 0) { + pa_log_error(__FILE__": Failed to load module \"%s\" (argument: \"%s\"): initialization failed.\n", name, argument ? argument : ""); + goto fail; + } + + if (!c->modules) + c->modules = pa_idxset_new(NULL, NULL); + + if (!c->module_auto_unload_event) { + struct timeval ntv; + pa_gettimeofday(&ntv); + ntv.tv_sec += UNLOAD_POLL_TIME; + c->module_auto_unload_event = c->mainloop->time_new(c->mainloop, &ntv, timeout_callback, c); + } + assert(c->module_auto_unload_event); + + assert(c->modules); + r = pa_idxset_put(c->modules, m, &m->index); + assert(r >= 0 && m->index != PA_IDXSET_INVALID); + + pa_log_info(__FILE__": Loaded \"%s\" (index: #%u; argument: \"%s\").\n", m->name, m->index, m->argument ? m->argument : ""); + + pa_subscription_post(c, PA_SUBSCRIPTION_EVENT_MODULE|PA_SUBSCRIPTION_EVENT_NEW, m->index); + + return m; + +fail: + + if (m) { + pa_xfree(m->argument); + pa_xfree(m->name); + + if (m->dl) + lt_dlclose(m->dl); + + pa_xfree(m); + } + + return NULL; +} + +static void pa_module_free(pa_module *m) { + assert(m && m->done && m->core); + + if (m->core->disallow_module_loading) + return; + + pa_log_info(__FILE__": Unloading \"%s\" (index: #%u).\n", m->name, m->index); + + m->done(m->core, m); + + lt_dlclose(m->dl); + + pa_log_info(__FILE__": Unloaded \"%s\" (index: #%u).\n", m->name, m->index); + + pa_subscription_post(m->core, PA_SUBSCRIPTION_EVENT_MODULE|PA_SUBSCRIPTION_EVENT_REMOVE, m->index); + + pa_xfree(m->name); + pa_xfree(m->argument); + pa_xfree(m); +} + +void pa_module_unload(pa_core *c, pa_module *m) { + assert(c && m); + + assert(c->modules); + if (!(m = pa_idxset_remove_by_data(c->modules, m, NULL))) + return; + + pa_module_free(m); +} + +void pa_module_unload_by_index(pa_core *c, uint32_t idx) { + pa_module *m; + assert(c && idx != PA_IDXSET_INVALID); + + assert(c->modules); + if (!(m = pa_idxset_remove_by_index(c->modules, idx))) + return; + + pa_module_free(m); +} + +static void free_callback(void *p, PA_GCC_UNUSED void *userdata) { + pa_module *m = p; + assert(m); + pa_module_free(m); +} + +void pa_module_unload_all(pa_core *c) { + assert(c); + + if (!c->modules) + return; + + pa_idxset_free(c->modules, free_callback, NULL); + c->modules = NULL; + + if (c->module_auto_unload_event) { + c->mainloop->time_free(c->module_auto_unload_event); + c->module_auto_unload_event = NULL; + } + + if (c->module_defer_unload_event) { + c->mainloop->defer_free(c->module_defer_unload_event); + c->module_defer_unload_event = NULL; + } +} + +static int unused_callback(void *p, PA_GCC_UNUSED uint32_t idx, int *del, void *userdata) { + pa_module *m = p; + time_t *now = userdata; + assert(p && del && now); + + if (m->n_used == 0 && m->auto_unload && m->last_used_time+m->core->module_idle_time <= *now) { + pa_module_free(m); + *del = 1; + } + + return 0; +} + +void pa_module_unload_unused(pa_core *c) { + time_t now; + assert(c); + + if (!c->modules) + return; + + time(&now); + pa_idxset_foreach(c->modules, unused_callback, &now); +} + +static int unload_callback(void *p, PA_GCC_UNUSED uint32_t idx, int *del, PA_GCC_UNUSED void *userdata) { + pa_module *m = p; + assert(m); + + if (m->unload_requested) { + pa_module_free(m); + *del = 1; + } + + return 0; +} + +static void defer_cb(pa_mainloop_api*api, pa_defer_event *e, void *userdata) { + pa_core *core = userdata; + api->defer_enable(e, 0); + + if (!core->modules) + return; + + pa_idxset_foreach(core->modules, unload_callback, NULL); + +} + +void pa_module_unload_request(pa_module *m) { + assert(m); + + m->unload_requested = 1; + + if (!m->core->module_defer_unload_event) + m->core->module_defer_unload_event = m->core->mainloop->defer_new(m->core->mainloop, defer_cb, m->core); + + m->core->mainloop->defer_enable(m->core->module_defer_unload_event, 1); +} + +void pa_module_set_used(pa_module*m, int used) { + assert(m); + + if (m->n_used != used) + pa_subscription_post(m->core, PA_SUBSCRIPTION_EVENT_MODULE|PA_SUBSCRIPTION_EVENT_CHANGE, m->index); + + if (m->n_used != used && used == 0) + time(&m->last_used_time); + + m->n_used = used; +} + +pa_modinfo *pa_module_get_info(pa_module *m) { + assert(m); + + return pa_modinfo_get_by_handle(m->dl); +} -- cgit