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 #include <assert.h>
  25
  26 #include <pulse/xmalloc.h>
  27
  28 #include <pulsecore/log.h>
  29
  30 #include "props.h"
  31
  32 typedef struct pa_property {
  33     char *name;  /* Points to memory allocated by the property subsystem */
  34     void *data;  /* Points to memory maintained by the caller */
  35 } pa_property;
  36
  37 /* Allocate a new property object */
  38 static pa_property* property_new(const char *name, void *data) {
  39     pa_property* p;
  40     assert(name && data);
  41
  42     p = pa_xmalloc(sizeof(pa_property));
  43     p->name = pa_xstrdup(name);
  44     p->data = data;
  45
  46     return p;
  47 }
  48
  49 /* Free a property object */
  50 static void property_free(pa_property *p) {
  51     assert(p);
  52
  53     pa_xfree(p->name);
  54     pa_xfree(p);
  55 }
  56
  57 void* pa_property_get(pa_core *c, const char *name) {
  58     pa_property *p;
  59     assert(c && name && c->properties);
  60
  61     if (!(p = pa_hashmap_get(c->properties, name)))
  62         return NULL;
  63
  64     return p->data;
  65 }
  66
  67 int pa_property_set(pa_core *c, const char *name, void *data) {
  68     pa_property *p;
  69     assert(c && name && data && c->properties);
  70
  71     if (pa_hashmap_get(c->properties, name))
  72         return -1;
  73
  74     p = property_new(name, data);
  75     pa_hashmap_put(c->properties, p->name, p);
  76     return 0;
  77 }
  78
  79 int pa_property_remove(pa_core *c, const char *name) {
  80     pa_property *p;
  81     assert(c && name && c->properties);
  82
  83     if (!(p = pa_hashmap_remove(c->properties, name)))
  84         return -1;
  85
  86     property_free(p);
  87     return 0;
  88 }
  89
  90 void pa_property_init(pa_core *c) {
  91     assert(c);
  92
  93     c->properties = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);
  94 }
  95
  96 void pa_property_cleanup(pa_core *c) {
  97     assert(c);
  98
  99     if (!c->properties)
 100         return;
 101
 102     assert(!pa_hashmap_size(c->properties));
 103
 104     pa_hashmap_free(c->properties, NULL, NULL);
 105     c->properties = NULL;
 106
 107 }
 108
 109 void pa_property_dump(pa_core *c, pa_strbuf *s) {
 110     void *state = NULL;
 111     pa_property *p;
 112     assert(c && s);
 113
 114     while ((p = pa_hashmap_iterate(c->properties, &state, NULL)))
 115         pa_strbuf_printf(s, "[%s] -> [%p]\n", p->name, p->data);
 116 }
 117
 118 int pa_property_replace(pa_core *c, const char *name, void *data) {
 119     assert(c && name);
 120
 121     pa_property_remove(c, name);
 122     return pa_property_set(c, name, data);
 123 }