kmm_plugin_i *
kmmint_get_plugin_i(wchar_t * name)
{
kmm_plugin_i * p;
size_t cb;
if(FAILED(StringCbLength(name, KMM_MAXCB_NAME, &cb)))
return NULL;
cb += sizeof(wchar_t);
EnterCriticalSection(&cs_kmm);
p = (kmm_plugin_i *) hash_lookup(hash_plugins, (void *) name);
if(p == NULL) {
p = PMALLOC(sizeof(kmm_plugin_i));
ZeroMemory(p, sizeof(kmm_plugin_i));
p->magic = KMM_PLUGIN_MAGIC;
p->p.name = PMALLOC(cb);
StringCbCopy(p->p.name, cb, name);
p->state = KMM_PLUGIN_STATE_NONE;
hash_add(hash_plugins, (void *) p->p.name, (void *) p);
kmmint_list_plugin(p);
}
LeaveCriticalSection(&cs_kmm);
return p;
}
/*! \internal
\brief Initialize a plugin
\note If kmmint_init_plugin() is called on a plugin, then kmmint_exit_plugin()
\b must be called for the plugin.
\note Should only be called from the context of the registrar thread */
void kmmint_init_plugin(kmm_plugin_i * p) {
DWORD dummy;
khm_handle csp_plugin = NULL;
khm_handle csp_plugins = NULL;
khm_int32 t;
/* the following will be undone in kmmint_exit_plugin() */
kmm_hold_plugin(kmm_handle_from_plugin(p));
EnterCriticalSection(&cs_kmm);
if(p->state != KMM_PLUGIN_STATE_REG &&
p->state != KMM_PLUGIN_STATE_HOLD)
{
LeaveCriticalSection(&cs_kmm);
goto _exit;
}
_begin_task(0);
_report_mr1(KHERR_NONE, MSG_IP_TASK_DESC, _cstr(p->p.name));
_describe();
if(p->state == KMM_PLUGIN_STATE_HOLD) {
/* if this plugin was held, then we already had a hold
from the initial attempt to start the plugin. Undo
the hold we did a few lines earlier. */
kmm_release_plugin(kmm_handle_from_plugin(p));
/* same for the plugin count for the module. */
#ifdef DEBUG
assert(p->flags & KMM_PLUGIN_FLAG_IN_MODCOUNT);
#endif
p->module->plugin_count--;
p->flags &= ~KMM_PLUGIN_FLAG_IN_MODCOUNT;
}
p->state = KMM_PLUGIN_STATE_PREINIT;
kmmint_delist_plugin(p);
kmmint_list_plugin(p);
LeaveCriticalSection(&cs_kmm);
if(KHM_FAILED(kmm_get_plugins_config(0, &csp_plugins))) {
_report_mr0(KHERR_ERROR, MSG_IP_GET_CONFIG);
p->state = KMM_PLUGIN_STATE_FAIL_UNKNOWN;
goto _exit;
}
if(KHM_FAILED(kmm_get_plugin_config(p->p.name, 0, &csp_plugin))) {
if(KHM_FAILED(kmm_register_plugin(&(p->p), 0))) {
_report_mr0(KHERR_ERROR, MSG_IP_NOT_REGISTERED);
p->state = KMM_PLUGIN_STATE_FAIL_NOT_REGISTERED;
goto _exit;
}
if(KHM_FAILED(kmm_get_plugin_config(p->p.name, 0, &csp_plugin))) {
_report_mr0(KHERR_ERROR, MSG_IP_NOT_REGISTERED);
p->state = KMM_PLUGIN_STATE_FAIL_NOT_REGISTERED;
goto _exit;
}
}
if (KHM_SUCCEEDED(khc_read_int32(csp_plugin, L"Disabled", &t)) && t) {
p->flags |= KMM_PLUGIN_FLAG_DISABLED;
p->state = KMM_PLUGIN_STATE_FAIL_DISABLED;
goto _exit;
}
#if 0
/*TODO: check the failure count and act accordingly */
if(KHM_SUCCEEDED(khc_read_int32(csp_plugin, L"FailureCount", &t)) && (t > 0)) {
}
#endif
EnterCriticalSection(&cs_kmm);
p->n_depends = 0;
p->n_unresolved = 0;
do {
wchar_t * deps = NULL;
wchar_t * d;
khm_size sz = 0;
if(khc_read_multi_string(csp_plugin, L"Dependencies",
NULL, &sz) != KHM_ERROR_TOO_LONG)
break;
deps = PMALLOC(sz);
if(KHM_FAILED(khc_read_multi_string(csp_plugin, L"Dependencies",
deps, &sz))) {
if(deps)
PFREE(deps);
break;
}
for(d = deps; d && *d; d = multi_string_next(d)) {
kmm_plugin_i * pd;
int i;
pd = kmmint_get_plugin_i(d);
if(pd->state == KMM_PLUGIN_STATE_NONE) {
/* the dependant was not previously known */
pd->state = KMM_PLUGIN_STATE_PLACEHOLDER;
}
for(i=0; i < pd->n_dependants; i++) {
if(pd->dependants[i] == p)
break;
}
if(i >= pd->n_dependants) {
if( pd->n_dependants >= KMM_MAX_DEPENDANTS ) {
/*TODO: handle this gracefully */
RaiseException(1, EXCEPTION_NONCONTINUABLE, 0, NULL);
}
/* released in kmmint_free_plugin() */
kmm_hold_plugin(kmm_handle_from_plugin(p));
pd->dependants[pd->n_dependants] = p;
pd->n_dependants++;
}
p->n_depends++;
if(pd->state != KMM_PLUGIN_STATE_RUNNING) {
p->n_unresolved++;
}
}
if(p->n_unresolved > 0) {
p->state = KMM_PLUGIN_STATE_HOLD;
}
PFREE(deps);
} while(FALSE);
#ifdef DEBUG
assert(!(p->flags & KMM_PLUGIN_FLAG_IN_MODCOUNT));
#endif
p->flags |= KMM_PLUGIN_FLAG_IN_MODCOUNT;
p->module->plugin_count++;
LeaveCriticalSection(&cs_kmm);
if(p->state == KMM_PLUGIN_STATE_HOLD) {
_report_mr1(KHERR_INFO, MSG_IP_HOLD, _dupstr(p->p.name));
goto _exit_post;
}
kmmint_add_to_plugin_queue(p);
p->ht_thread = CreateThread(NULL,
0,
kmmint_plugin_broker,
(LPVOID) p,
CREATE_SUSPENDED,
&dummy);
p->state = KMM_PLUGIN_STATE_INIT;
ResumeThread(p->ht_thread);
_exit_post:
if(csp_plugin != NULL)
khc_close_space(csp_plugin);
if(csp_plugins != NULL)
khc_close_space(csp_plugins);
_report_mr2(KHERR_INFO, MSG_IP_STATE,
_dupstr(p->p.name), _int32(p->state));
_end_task();
return;
/* jump here if an error condition happens before the plugin
broker thread starts and the plugin should be unloaded */
_exit:
if(csp_plugin != NULL)
khc_close_space(csp_plugin);
if(csp_plugins != NULL)
khc_close_space(csp_plugins);
_report_mr2(KHERR_WARNING, MSG_IP_EXITING,
_dupstr(p->p.name), _int32(p->state));
_end_task();
#ifdef ASYNC_PLUGIN_UNLOAD_ON_FAILURE
kmm_hold_plugin(kmm_handle_from_plugin(p));
kmq_post_message(KMSG_KMM, KMSG_KMM_I_REG, KMM_REG_EXIT_PLUGIN, (void *) p);
#else
kmmint_exit_plugin(p);
#endif
}
