src/pulsecore/protocol-cli.c

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2004-2006 Lennart Poettering
   5
   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.
  10
  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.
  15
  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
  19   USA.
  20 ***/
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <stdlib.h>
  27
  28 #include <pulse/xmalloc.h>
  29
  30 #include <pulsecore/cli.h>
  31 #include <pulsecore/log.h>
  32 #include <pulsecore/macro.h>
  33 #include <pulsecore/shared.h>
  34
  35 #include "protocol-cli.h"
  36
  37 /* Don't allow more than this many concurrent connections */
  38 #define MAX_CONNECTIONS 25
  39
  40 struct pa_cli_protocol {
  41     PA_REFCNT_DECLARE;
  42
  43     pa_core *core;
  44     pa_idxset *connections;
  45 };
  46
  47 static void cli_unlink(pa_cli_protocol *p, pa_cli *c) {
  48     pa_assert(p);
  49     pa_assert(c);
  50
  51     pa_idxset_remove_by_data(p->connections, c, NULL);
  52     pa_cli_free(c);
  53 }
  54
  55 static void cli_eof_cb(pa_cli*c, void*userdata) {
  56     pa_cli_protocol *p = userdata;
  57     pa_assert(p);
  58
  59     cli_unlink(p, c);
  60 }
  61
  62 void pa_cli_protocol_connect(pa_cli_protocol *p, pa_iochannel *io, pa_module *m) {
  63     pa_cli *c;
  64
  65     pa_assert(p);
  66     pa_assert(io);
  67     pa_assert(m);
  68
  69     if (pa_idxset_size(p->connections)+1 > MAX_CONNECTIONS) {
  70         pa_log("Warning! Too many connections (%u), dropping incoming connection.", MAX_CONNECTIONS);
  71         pa_iochannel_free(io);
  72         return;
  73     }
  74
  75     c = pa_cli_new(p->core, io, m);
  76     pa_cli_set_eof_callback(c, cli_eof_cb, p);
  77
  78     pa_idxset_put(p->connections, c, NULL);
  79 }
  80
  81 void pa_cli_protocol_disconnect(pa_cli_protocol *p, pa_module *m) {
  82     pa_cli *c;
  83     void *state = NULL;
  84
  85     pa_assert(p);
  86     pa_assert(m);
  87
  88     while ((c = pa_idxset_iterate(p->connections, &state, NULL)))
  89         if (pa_cli_get_module(c) == m)
  90             cli_unlink(p, c);
  91 }
  92
  93 static pa_cli_protocol* cli_protocol_new(pa_core *c) {
  94     pa_cli_protocol *p;
  95
  96     pa_assert(c);
  97
  98     p = pa_xnew(pa_cli_protocol, 1);
  99     PA_REFCNT_INIT(p);
 100     p->core = c;
 101     p->connections = pa_idxset_new(NULL, NULL);
 102
 103     pa_assert_se(pa_shared_set(c, "cli-protocol", p) >= 0);
 104
 105     return p;
 106 }
 107
 108 pa_cli_protocol* pa_cli_protocol_get(pa_core *c) {
 109     pa_cli_protocol *p;
 110
 111     if ((p = pa_shared_get(c, "cli-protocol")))
 112         return pa_cli_protocol_ref(p);
 113
 114     return cli_protocol_new(c);
 115 }
 116
 117 pa_cli_protocol* pa_cli_protocol_ref(pa_cli_protocol *p) {
 118     pa_assert(p);
 119     pa_assert(PA_REFCNT_VALUE(p) >= 1);
 120
 121     PA_REFCNT_INC(p);
 122
 123     return p;
 124 }
 125
 126 void pa_cli_protocol_unref(pa_cli_protocol *p) {
 127     pa_cli *c;
 128     pa_assert(p);
 129     pa_assert(PA_REFCNT_VALUE(p) >= 1);
 130
 131     if (PA_REFCNT_DEC(p) > 0)
 132         return;
 133
 134     while ((c = pa_idxset_first(p->connections, NULL)))
 135         cli_unlink(p, c);
 136
 137     pa_idxset_free(p->connections, NULL, NULL);
 138
 139     pa_assert_se(pa_shared_remove(p->core, "cli-protocol") >= 0);
 140
 141     pa_xfree(p);
 142 }