Call the onload function whenever a module is loaded/reload.

Allows one to teardown whatever they setup properly when
the module gets a full reload. See example module for how it works.

includes/kore.h

@@ -171,10 +171,15 @@ struct kore_handler_params {
 #define HANDLER_TYPE_STATIC	1
 #define HANDLER_TYPE_DYNAMIC	2
 
+#define KORE_MODULE_LOAD	1
+#define KORE_MODULE_UNLOAD	2
+
 struct kore_module {
 	void			*handle;
 	char			*path;
 	char			*onload;
+	void			(*ocb)(int);
+
 	time_t			mtime;
 
 	TAILQ_ENTRY(kore_module)	list;

modules/example/module.conf

@@ -50,7 +50,7 @@ workers		4
 # Load modules (you can load multiple at the same time).
 # An additional parameter can be specified as the "onload" function
 # which Kore will call when the module is loaded/reloaded.
-load modules/example/example.module
+load modules/example/example.module	example_load
 
 # Validators
 #	validator	name	type	regex|function

modules/example/src/example.c

@@ -19,6 +19,7 @@
 
 #include "static.h"
 
+void		example_load(int);
 int		serve_style_css(struct http_request *);
 int		serve_index(struct http_request *);
 int		serve_intro(struct http_request *);
@@ -44,6 +45,22 @@ char *b64tests[] = {
 	NULL
 };
 
+void
+example_load(int state)
+{
+	switch (state) {
+	case KORE_MODULE_LOAD:
+		kore_log(LOG_NOTICE, "module loading");
+		break;
+	case KORE_MODULE_UNLOAD:
+		kore_log(LOG_NOTICE, "module unloading");
+		break;
+	default:
+		kore_log(LOG_NOTICE, "state %d unknown!", state);
+		break;
+	}
+}
+
 int
 serve_style_css(struct http_request *req)
 {

src/module.c

@@ -35,7 +35,6 @@ kore_module_load(char *path, char *onload)
 {
 	struct stat		st;
 	struct kore_module	*module;
-	void			(*cb)(void);
 
 	kore_debug("kore_module_load(%s, %s)", path, onload);
 
@@ -53,10 +52,10 @@ kore_module_load(char *path, char *onload)
 
 	if (onload != NULL) {
 		module->onload = kore_strdup(onload);
-		cb = dlsym(module->handle, onload);
-		if (cb == NULL)
+		module->ocb = dlsym(module->handle, onload);
+		if (module->ocb == NULL)
 			fatal("%s: onload '%s' not present", path, onload);
-		cb();
+		module->ocb(KORE_MODULE_LOAD);
 	}
 
 	if (kore_cb_name != NULL && kore_cb == NULL)
@@ -72,7 +71,6 @@ kore_module_reload(void)
 	struct kore_domain		*dom;
 	struct kore_module_handle	*hdlr;
 	struct kore_module		*module;
-	void				(*onload)(void);
 
 	kore_cb = NULL;
 
@@ -86,6 +84,8 @@ kore_module_reload(void)
 		if (module->mtime == st.st_mtime)
 			continue;
 
+		module->ocb(KORE_MODULE_UNLOAD);
+
 		module->mtime = st.st_mtime;
 		if (dlclose(module->handle))
 			fatal("cannot close existing module: %s", dlerror());
@@ -95,13 +95,13 @@ kore_module_reload(void)
 			fatal("kore_module_reload(): %s", dlerror());
 
 		if (module->onload != NULL) {
-			onload = dlsym(module->handle, module->onload);
-			if (onload == NULL) {
+			module->ocb = dlsym(module->handle, module->onload);
+			if (module->ocb == NULL) {
 				fatal("%s: onload '%s' not present",
 				    module->path, module->onload);
 			}
 
-			onload();
+			module->ocb(KORE_MODULE_LOAD);
 		}
 
 		if (kore_cb_name != NULL && kore_cb == NULL)