8372977: unnecessary gthread-2.0 loading

Reviewed-by: prr, kizune

Author: Alexander Zvegintsev

src/java.desktop/unix/native/libawt_xawt/awt/gtk3_interface.c

@@ -42,7 +42,6 @@
 #include "debug_assert.h"
 
 static void *gtk3_libhandle = NULL;
-static void *gthread_libhandle = NULL;
 
 static void transform_detail_string (const gchar *detail,
                                      GtkStyleContext *context);
@@ -79,15 +78,6 @@ static void* dl_symbol(const char* name)
     return result;
 }
 
-static void* dl_symbol_gthread(const char* name)
-{
-    void* result = dlsym(gthread_libhandle, name);
-    if (!result)
-        longjmp(j, NO_SYMBOL_EXCEPTION);
-
-    return result;
-}
-
 gboolean gtk3_check(const char* lib_name, gboolean load)
 {
     if (gtk3_libhandle != NULL) {
@@ -264,13 +254,6 @@ GtkApi* gtk3_load(JNIEnv *env, const char* lib_name)
         return FALSE;
     }
 
-    gthread_libhandle = dlopen(GTHREAD_LIB_VERSIONED, RTLD_LAZY | RTLD_LOCAL);
-    if (gthread_libhandle == NULL) {
-        gthread_libhandle = dlopen(GTHREAD_LIB, RTLD_LAZY | RTLD_LOCAL);
-        if (gthread_libhandle == NULL)
-            return FALSE;
-    }
-
     if (setjmp(j) == 0)
     {
         fp_gtk_check_version = dl_symbol("gtk_check_version");
@@ -634,9 +617,6 @@ GtkApi* gtk3_load(JNIEnv *env, const char* lib_name)
         dlclose(gtk3_libhandle);
         gtk3_libhandle = NULL;
 
-        dlclose(gthread_libhandle);
-        gthread_libhandle = NULL;
-
         return NULL;
     }
 
@@ -735,7 +715,6 @@ static int gtk3_unload()
 
     dlerror();
     dlclose(gtk3_libhandle);
-    dlclose(gthread_libhandle);
     if ((gtk3_error = dlerror()) != NULL)
     {
         return FALSE;

src/java.desktop/unix/native/libawt_xawt/awt/gtk_interface.h

@@ -38,9 +38,6 @@
 #define TRUE            (!FALSE)
 #endif
 
-#define GTHREAD_LIB_VERSIONED VERSIONED_JNI_LIB_NAME("gthread-2.0", "0")
-#define GTHREAD_LIB JNI_LIB_NAME("gthread-2.0")
-
 #define _G_TYPE_CIC(ip, gt, ct)       ((ct*) ip)
 #define G_TYPE_CHECK_INSTANCE_CAST(instance, g_type, c_type)  \
                                     (_G_TYPE_CIC ((instance), (g_type), c_type))
@@ -850,9 +847,6 @@ typedef struct GtkApi {
 gboolean gtk_load(JNIEnv *env, GtkVersion version, gboolean verbose);
 gboolean gtk_check_version(GtkVersion version);
 
-typedef struct _GThreadFunctions GThreadFunctions;
-static gboolean (*fp_g_thread_get_initialized)(void);
-static void (*fp_g_thread_init)(GThreadFunctions *vtable);
 static void (*fp_gdk_threads_init)(void);
 static void (*fp_gdk_threads_enter)(void);
 static void (*fp_gdk_threads_leave)(void);