Add dynamix reloading functions

Also reserve a couple return values for read_input.

2 files changed, 11 insertions, 0 deletions

diff --git a/src/disp.c b/src/disp.c
index 27f74e4..18b6168 100644
--- a/src/disp.c
+++ b/src/disp.c
@@ -17,6 +17,7 @@
 #include "config.h"
 
 #include <dlfcn.h>
+#include <limits.h>
 #include <string.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -24,6 +25,10 @@
 
 #include "disp.h"
 
+/* Reserved return values for the read_input function. */
+#define DISP_ERR INT_MAX
+#define DISP_RELOAD (INT_MAX - 1)
+
 #define dlsym_and_check(dest, name)				\
 	dest->name = dlsym(dest->dl_handle, #name);		\
 	if ((!dest->name) || (dest->name == dest->dl_handle)) {	\
@@ -52,6 +57,8 @@ get_disp(char *disp_name)
 		exit(1);
 	}
 
+	printf("INFO: successfully loaded symbols from \"%s\"\n", so_path);
+
 	struct disp *disp = malloc(sizeof(*disp));
 	disp->dl_handle = handle;
 	dlsym_and_check(disp, init);
@@ -59,6 +66,8 @@ get_disp(char *disp_name)
 	dlsym_and_check(disp, read_input);
 	dlsym_and_check(disp, display_res);
 	dlsym_and_check(disp, destroy);
+	dlsym_and_check(disp, pre_reload);
+	dlsym_and_check(disp, post_reload);
 
 	return disp;
 #else
diff --git a/src/disp.h b/src/disp.h
index e011884..d0b2d19 100644
--- a/src/disp.h
+++ b/src/disp.h
@@ -30,6 +30,8 @@ struct disp {
 	int  (*read_input)(void);
 	void (*display_res)(bool, int);
 	void (*destroy)(void);
+	void *(*pre_reload)(void);
+	void (*post_reload)(void *);
 };
 
 /* Get a display handler for the given display type. */