code.delx.au - pulseaudio/blob - polyp/props.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of polypaudio.
   5
   6   polypaudio 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 of the License,
   9   or (at your option) any later version.
  10
  11   polypaudio 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 polypaudio; if not, write to the Free Software
  18   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  19   USA.
  20 ***/
  21
  22 #include <assert.h>
  23
  24 #include "xmalloc.h"
  25 #include "props.h"
  26 #include "log.h"
  27
  28 struct pa_property {
  29     char *name;  /* Points to memory allocated by the property subsystem */
  30     void *data;  /* Points to memory maintained by the caller */
  31 };
  32
  33 /* Allocate a new property object */
  34 static struct pa_property* property_new(const char *name, void *data) {
  35     struct pa_property* p;
  36     assert(name && data);
  37
  38     p = pa_xmalloc(sizeof(struct pa_property));
  39     p->name = pa_xstrdup(name);
  40     p->data = data;
  41
  42     return p;
  43 }
  44
  45 /* Free a property object */
  46 static void property_free(struct pa_property *p) {
  47     assert(p);
  48
  49     pa_xfree(p->name);
  50     pa_xfree(p);
  51 }
  52
  53 void* pa_property_get(struct pa_core *c, const char *name) {
  54     struct pa_property *p;
  55     assert(c && name && c->properties);
  56
  57     if (!(p = pa_hashmap_get(c->properties, name)))
  58         return NULL;
  59
  60     return p->data;
  61 }
  62
  63 int pa_property_set(struct pa_core *c, const char *name, void *data) {
  64     struct pa_property *p;
  65     assert(c && name && data && c->properties);
  66
  67     if (pa_hashmap_get(c->properties, name))
  68         return -1;
  69
  70     p = property_new(name, data);
  71     pa_hashmap_put(c->properties, p->name, p);
  72     return 0;
  73 }
  74
  75 int pa_property_remove(struct pa_core *c, const char *name) {
  76     struct pa_property *p;
  77     assert(c && name && c->properties);
  78
  79     if (!(p = pa_hashmap_remove(c->properties, name)))
  80         return -1;
  81
  82     property_free(p);
  83     return 0;
  84 }
  85
  86 void pa_property_init(struct pa_core *c) {
  87     assert(c);
  88
  89     c->properties = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);
  90 }
  91
  92 void pa_property_cleanup(struct pa_core *c) {
  93     assert(c);
  94
  95     if (!c->properties)
  96         return;
  97
  98     assert(!pa_hashmap_ncontents(c->properties));
  99
 100     pa_hashmap_free(c->properties, NULL, NULL);
 101     c->properties = NULL;
 102
 103 }
 104
 105 void pa_property_dump(struct pa_core *c, struct pa_strbuf *s) {
 106     void *state = NULL;
 107     struct pa_property *p;
 108     assert(c && s);
 109
 110     while ((p = pa_hashmap_iterate(c->properties, &state, NULL)))
 111         pa_strbuf_printf(s, "[%s] -> [%p]\n", p->name, p->data);
 112 }
 113
 114 int pa_property_replace(struct pa_core *c, const char *name, void *data) {
 115     assert(c && name);
 116
 117     pa_property_remove(c, name);
 118     return pa_property_set(c, name, data);
 119 }