code.delx.au - pulseaudio/blob - src/pulsecore/props.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   5
   6   Copyright 2004-2006 Lennart Poettering
   7
   8   PulseAudio is free software; you can redistribute it and/or modify
   9   it under the terms of the GNU Lesser General Public License as published
  10   by the Free Software Foundation; either version 2 of the License,
  11   or (at your option) any later version.
  12
  13   PulseAudio is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with PulseAudio; if not, write to the Free Software
  20   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  21   USA.
  22 ***/
  23
  24 #ifdef HAVE_CONFIG_H
  25 #include <config.h>
  26 #endif
  27
  28 #include <pulse/xmalloc.h>
  29 #include <pulsecore/log.h>
  30 #include <pulsecore/macro.h>
  31
  32 #include "props.h"
  33
  34 typedef struct pa_property {
  35     char *name;  /* Points to memory allocated by the property subsystem */
  36     void *data;  /* Points to memory maintained by the caller */
  37 } pa_property;
  38
  39 /* Allocate a new property object */
  40 static pa_property* property_new(const char *name, void *data) {
  41     pa_property* p;
  42
  43     pa_assert(name);
  44     pa_assert(data);
  45
  46     p = pa_xnew(pa_property, 1);
  47     p->name = pa_xstrdup(name);
  48     p->data = data;
  49
  50     return p;
  51 }
  52
  53 /* Free a property object */
  54 static void property_free(pa_property *p) {
  55     pa_assert(p);
  56
  57     pa_xfree(p->name);
  58     pa_xfree(p);
  59 }
  60
  61 void* pa_property_get(pa_core *c, const char *name) {
  62     pa_property *p;
  63
  64     pa_assert(c);
  65     pa_assert(name);
  66     pa_assert(c->properties);
  67
  68     if (!(p = pa_hashmap_get(c->properties, name)))
  69         return NULL;
  70
  71     return p->data;
  72 }
  73
  74 int pa_property_set(pa_core *c, const char *name, void *data) {
  75     pa_property *p;
  76
  77     pa_assert(c);
  78     pa_assert(name);
  79     pa_assert(data);
  80     pa_assert(c->properties);
  81
  82     if (pa_hashmap_get(c->properties, name))
  83         return -1;
  84
  85     p = property_new(name, data);
  86     pa_hashmap_put(c->properties, p->name, p);
  87     return 0;
  88 }
  89
  90 int pa_property_remove(pa_core *c, const char *name) {
  91     pa_property *p;
  92
  93     pa_assert(c);
  94     pa_assert(name);
  95     pa_assert(c->properties);
  96
  97     if (!(p = pa_hashmap_remove(c->properties, name)))
  98         return -1;
  99
 100     property_free(p);
 101     return 0;
 102 }
 103
 104 void pa_property_init(pa_core *c) {
 105     pa_assert(c);
 106
 107     c->properties = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);
 108 }
 109
 110 void pa_property_cleanup(pa_core *c) {
 111     pa_assert(c);
 112
 113     if (!c->properties)
 114         return;
 115
 116     pa_assert(!pa_hashmap_size(c->properties));
 117
 118     pa_hashmap_free(c->properties, NULL, NULL);
 119     c->properties = NULL;
 120
 121 }
 122
 123 void pa_property_dump(pa_core *c, pa_strbuf *s) {
 124     void *state = NULL;
 125     pa_property *p;
 126
 127     pa_assert(c);
 128     pa_assert(s);
 129
 130     while ((p = pa_hashmap_iterate(c->properties, &state, NULL)))
 131         pa_strbuf_printf(s, "[%s] -> [%p]\n", p->name, p->data);
 132 }
 133
 134 int pa_property_replace(pa_core *c, const char *name, void *data) {
 135     pa_assert(c);
 136     pa_assert(name);
 137
 138     pa_property_remove(c, name);
 139     return pa_property_set(c, name, data);
 140 }