summaryrefslogtreecommitdiffstats
path: root/polyp/module.c
blob: 5c6f0fb61d7d9d3aa570603a6c2fbd8be92d3892 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
/* $Id$ */

/***
  This file is part of polypaudio.
 
  polypaudio is free software; you can redistribute it and/or modify
  it under the terms of the GNU 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 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 <config.h>
#endif

#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <string.h>
#include <errno.h>

#include "module.h"

struct pa_module* pa_module_load(struct pa_core *c, const char *name, const char *argument) {
    struct pa_module *m = NULL;
    int r;
    
    assert(c && name);

    m = malloc(sizeof(struct pa_module));
    assert(m);

    m->name = strdup(name);
    m->argument = argument ? strdup(argument) : NULL;
    
    if (!(m->dl = lt_dlopenext(name)))
        goto fail;

    if (!(m->init = lt_dlsym(m->dl, "pa_module_init")))
        goto fail;

    if (!(m->done = lt_dlsym(m->dl, "pa_module_done")))
        goto fail;
    
    m->userdata = NULL;
    m->core = c;

    assert(m->init);
    if (m->init(c, m) < 0)
        goto fail;

    if (!c->modules)
        c->modules = pa_idxset_new(NULL, NULL);
    
    assert(c->modules);
    r = pa_idxset_put(c->modules, m, &m->index);
    assert(r >= 0 && m->index != PA_IDXSET_INVALID);

    fprintf(stderr, "module: loaded %u \"%s\" with argument \"%s\".\n", m->index, m->name, m->argument);
    
    return m;
    
fail:
    if (m) {
        free(m->argument);
        free(m->name);
        
        if (m->dl)
            lt_dlclose(m->dl);

        free(m);
    }

    return NULL;
}

static void pa_module_free(struct pa_module *m) {
    assert(m && m->done && m->core);
    m->done(m->core, m);

    lt_dlclose(m->dl);
    
    fprintf(stderr, "module: unloaded %u \"%s\".\n", m->index, m->name);

    free(m->name);
    free(m->argument);
    free(m);
}


void pa_module_unload(struct pa_core *c, struct 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(struct pa_core *c, uint32_t index) {
    struct pa_module *m;
    assert(c && index != PA_IDXSET_INVALID);

    assert(c->modules);
    if (!(m = pa_idxset_remove_by_index(c->modules, index)))
        return;

    pa_module_free(m);
}

static void free_callback(void *p, void *userdata) {
    struct pa_module *m = p;
    assert(m);
    pa_module_free(m);
}

void pa_module_unload_all(struct pa_core *c) {
    assert(c);

    if (!c->modules)
        return;

    pa_idxset_free(c->modules, free_callback, NULL);
    c->modules = NULL;
}

struct once_info {
    struct pa_core *core;
    uint32_t index;
};
    

static void module_unload_once_callback(void *userdata) {
    struct once_info *i = userdata;
    assert(i);
    pa_module_unload_by_index(i->core, i->index);
    free(i);
}

void pa_module_unload_request(struct pa_core *c, struct pa_module *m) {
    struct once_info *i;
    assert(c && m);

    i = malloc(sizeof(struct once_info));
    assert(i);
    i->core = c;
    i->index = m->index;
    pa_mainloop_api_once(c->mainloop, module_unload_once_callback, i);
}