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gobject: use a DllMain to initialize gobject on windows

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It seems that VS 2015 optimizes out the constructor on windows,
so it is better to use a DllMain to initialize the library
and keep using a normal constructor on the other platforms.
This research was done by  Arnav Singh.

https://bugzilla.gnome.org/show_bug.cgi?id=752837
This commit is contained in:
Ignacio Casal Quinteiro 2015-10-09 13:22:34 +02:00
parent cd1eba043c
commit 7a29771a74
1 changed files with 61 additions and 25 deletions
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86
gobject/gtype.c
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@ -34,6 +34,10 @@
#include "glib-private.h"
#include "gconstructor.h"
#ifdef G_OS_WIN32
#include <windows.h>
#endif
#ifdef G_ENABLE_DEBUG
#define IF_DEBUG(debug_type) if (_g_type_debug_flags & G_TYPE_DEBUG_ ## debug_type)
#endif
@ -4360,17 +4364,8 @@ g_type_init (void)
g_assert_type_system_initialized ();
}
#if defined (G_HAS_CONSTRUCTORS)
#ifdef G_DEFINE_CONSTRUCTOR_NEEDS_PRAGMA
#pragma G_DEFINE_CONSTRUCTOR_PRAGMA_ARGS(gobject_init_ctor)
#endif
G_DEFINE_CONSTRUCTOR(gobject_init_ctor)
#else
# error Your platform/compiler is missing constructor support
#endif
static void
gobject_init_ctor (void)
gobject_init (void)
{
const gchar *env_string;
GTypeInfo info;
@ -4396,25 +4391,25 @@ gobject_init_ctor (void)
_g_type_debug_flags = g_parse_debug_string (env_string, debug_keys, G_N_ELEMENTS (debug_keys));
}
/* quarks */
static_quark_type_flags = g_quark_from_static_string ("-g-type-private--GTypeFlags");
static_quark_iface_holder = g_quark_from_static_string ("-g-type-private--IFaceHolder");
static_quark_dependants_array = g_quark_from_static_string ("-g-type-private--dependants-array");
/* type qname hash table */
static_type_nodes_ht = g_hash_table_new (g_str_hash, g_str_equal);
/* invalid type G_TYPE_INVALID (0)
*/
static_fundamental_type_nodes[0] = NULL;
/* void type G_TYPE_NONE
*/
node = type_node_fundamental_new_W (G_TYPE_NONE, g_intern_static_string ("void"), 0);
type = NODE_TYPE (node);
g_assert (type == G_TYPE_NONE);
/* interface fundamental type G_TYPE_INTERFACE (!classed)
*/
memset (&info, 0, sizeof (info));
@ -4422,48 +4417,89 @@ gobject_init_ctor (void)
type = NODE_TYPE (node);
type_data_make_W (node, &info, NULL);
g_assert (type == G_TYPE_INTERFACE);
G_WRITE_UNLOCK (&type_rw_lock);
_g_value_c_init ();
/* G_TYPE_TYPE_PLUGIN
*/
g_type_ensure (g_type_plugin_get_type ());
/* G_TYPE_* value types
*/
_g_value_types_init ();
/* G_TYPE_ENUM & G_TYPE_FLAGS
*/
_g_enum_types_init ();
/* G_TYPE_BOXED
*/
_g_boxed_type_init ();
/* G_TYPE_PARAM
*/
_g_param_type_init ();
/* G_TYPE_OBJECT
*/
_g_object_type_init ();
/* G_TYPE_PARAM_* pspec types
*/
_g_param_spec_types_init ();
/* Value Transformations
*/
_g_value_transforms_init ();
/* Signal system
*/
_g_signal_init ();
}
#if defined (G_OS_WIN32)
BOOL WINAPI DllMain (HINSTANCE hinstDLL,
DWORD fdwReason,
LPVOID lpvReserved);
BOOL WINAPI
DllMain (HINSTANCE hinstDLL,
DWORD fdwReason,
LPVOID lpvReserved)
{
switch (fdwReason)
{
case DLL_PROCESS_ATTACH:
gobject_init ();
break;
default:
/* do nothing */
;
}
return TRUE;
}
#elif defined (G_HAS_CONSTRUCTORS)
#ifdef G_DEFINE_CONSTRUCTOR_NEEDS_PRAGMA
#pragma G_DEFINE_CONSTRUCTOR_PRAGMA_ARGS(gobject_init_ctor)
#endif
G_DEFINE_CONSTRUCTOR(gobject_init_ctor)
static void
gobject_init_ctor (void)
{
gobject_init ();
}
#else
# error Your platform/compiler is missing constructor support
#endif
/**
* g_type_class_add_private:
* @g_class: class structure for an instantiatable type