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#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <string.h>
#include <errno.h>
#include "module.h"
#include "strbuf.h"
struct module* module_load(struct core *c, const char *name, const char *argument) {
struct module *m = NULL;
int r;
assert(c && name);
m = malloc(sizeof(struct 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, "module_init")))
goto fail;
if (!(m->done = lt_dlsym(m->dl, "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 = idxset_new(NULL, NULL);
assert(c->modules);
r = idxset_put(c->modules, m, &m->index);
assert(r >= 0 && m->index != 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 module_free(struct 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 module_unload(struct core *c, struct module *m) {
assert(c && m);
assert(c->modules);
if (!(m = idxset_remove_by_data(c->modules, m, NULL)))
return;
module_free(m);
}
void module_unload_by_index(struct core *c, uint32_t index) {
struct module *m;
assert(c && index != IDXSET_INVALID);
assert(c->modules);
if (!(m = idxset_remove_by_index(c->modules, index)))
return;
module_free(m);
}
void free_callback(void *p, void *userdata) {
struct module *m = p;
assert(m);
module_free(m);
}
void module_unload_all(struct core *c) {
assert(c);
if (!c->modules)
return;
idxset_free(c->modules, free_callback, NULL);
c->modules = NULL;
}
char *module_list_to_string(struct core *c) {
struct strbuf *s;
struct module *m;
uint32_t index = IDXSET_INVALID;
assert(c);
s = strbuf_new();
assert(s);
strbuf_printf(s, "%u module(s) loaded.\n", idxset_ncontents(c->modules));
for (m = idxset_first(c->modules, &index); m; m = idxset_next(c->modules, &index))
strbuf_printf(s, " index: %u, name: <%s>, argument: <%s>\n", m->index, m->name, m->argument);
return strbuf_tostring_free(s);
}
struct once_info {
struct core *core;
uint32_t index;
};
void module_unload_once_callback(void *userdata) {
struct once_info *i = userdata;
assert(i);
module_unload_by_index(i->core, i->index);
free(i);
}
void module_unload_request(struct core *c, struct module *m) {
struct once_info *i;
assert(c && m);
i = malloc(sizeof(struct once_info));
assert(i);
i->core = c;
i->index = m->index;
mainloop_once(c->mainloop, module_unload_once_callback, i);
}
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