Add dynamic loading for Win32.

Makefile.win32

@@ -35,6 +35,10 @@ ifeq ($(HAVE_XML), 1)
    LIBS += -lxml2
 endif
 
+ifeq ($(DYNAMIC), 1)
+   DEFINES += -DHAVE_DYNAMIC
+endif
+
 ifneq ($(V),1)
    Q := @
 endif

dynamic.c

@@ -26,18 +26,29 @@
 #include <libsnes.hpp>
 
 #ifdef HAVE_DYNAMIC
-#include <dlfcn.h>
 
+#ifdef _WIN32
+#include <windows.h>
+#define SYM(x) do { \
+   p##x = ((void*)GetProcAddress(lib_handle, #x)); \
+   if (p##x == NULL) { SSNES_ERR("Failed to load symbol: \"%s\"\n", #x); exit(1); } \
+} while(0)
+#else
+#include <dlfcn.h>
 #define SYM(x) do { \
    p##x = dlsym(lib_handle, #x); \
    if (p##x == NULL) { SSNES_ERR("Failed to load symbol: \"%s\"\n", #x); exit(1); } \
 } while(0)
-
+#endif // _WIN32
-#endif
+#endif // HAVE_DYNAMIC
 
 #ifdef HAVE_DYNAMIC
+#ifdef _WIN32
+static HMODULE lib_handle;
+#else
 static void *lib_handle = NULL;
 #endif
+#endif
 
 void (*psnes_init)(void);
 
@@ -86,7 +97,11 @@ void (*psnes_term)(void);
 static void load_dynamic(void)
 {
    SSNES_LOG("Loading dynamic libsnes from: \"%s\"\n", g_settings.libsnes);
+#ifdef _WIN32
+   lib_handle = LoadLibrary(g_settings.libsnes);
+#else
    lib_handle = dlopen(g_settings.libsnes, RTLD_LAZY);
+#endif
    if (!lib_handle)
    {
       SSNES_ERR("Failed to open dynamic library: \"%s\"\n", g_settings.libsnes);
@@ -171,6 +186,12 @@ void uninit_dlsym(void)
 {
 #ifdef HAVE_DYNAMIC
    if (lib_handle)
+   {
+#ifdef _WIN32
+      FreeLibrary(lib_handle);
+#else
       dlclose(lib_handle);
+#endif
+   }
 #endif
 }