ObjFW  Check-in [3f0940e36d]

Overview
Comment:Use the well hidden __objc_update_dispatch_table_for_class() function.

The old GNU API actually does export a function to update the dtable,
however, it is not defined in the headers anymore starting with gcc 4.6.

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SHA3-256: 3f0940e36d23a847b976ccd4dac2826ff872efed4e17c02c0a3583979dfaf6e9
User & Date: js on 2011-08-03 04:14:18
Other Links: manifest | tags
Context
2011-08-03
16:25
Fix a few OFString tests. check-in: cc93f51348 user: js tags: trunk
04:14
Use the well hidden __objc_update_dispatch_table_for_class() function. check-in: 3f0940e36d user: js tags: trunk
03:53
Always use the old GNU API, even with the new GNU runtime. check-in: 546332b4d7 user: js tags: trunk
Changes
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Modified src/OFObject.m from [4d946cf26f] to [b3a44692ae].

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#import "OFOutOfRangeException.h"

#import "macros.h"

#if defined(OF_OBJFW_RUNTIME)
# import <objfw-rt.h>
#elif defined(OF_OLD_GNU_RUNTIME)
# import <objc/sarray.h>
# import <objc/Protocol.h>
#endif

#ifdef _WIN32
# include <windows.h>
#endif









<








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#import "OFOutOfRangeException.h"

#import "macros.h"

#if defined(OF_OBJFW_RUNTIME)
# import <objfw-rt.h>
#elif defined(OF_OLD_GNU_RUNTIME)

# import <objc/Protocol.h>
#endif

#ifdef _WIN32
# include <windows.h>
#endif
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#ifndef __BIGGEST_ALIGNMENT__
# define __BIGGEST_ALIGNMENT__ 16
#endif

#define PRE_IVAR_ALIGN ((sizeof(struct pre_ivar) + \
	(__BIGGEST_ALIGNMENT__ - 1)) & ~(__BIGGEST_ALIGNMENT__ - 1))
#define PRE_IVAR ((struct pre_ivar*)(void*)((char*)self - PRE_IVAR_ALIGN))





static struct {
	Class isa;
} alloc_failed_exception;
static Class autoreleasePool = Nil;

static SEL cxx_construct = NULL;








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#ifndef __BIGGEST_ALIGNMENT__
# define __BIGGEST_ALIGNMENT__ 16
#endif

#define PRE_IVAR_ALIGN ((sizeof(struct pre_ivar) + \
	(__BIGGEST_ALIGNMENT__ - 1)) & ~(__BIGGEST_ALIGNMENT__ - 1))
#define PRE_IVAR ((struct pre_ivar*)(void*)((char*)self - PRE_IVAR_ALIGN))

#ifdef OF_OLD_GNU_RUNTIME
extern void __objc_update_dispatch_table_for_class(Class);
#endif

static struct {
	Class isa;
} alloc_failed_exception;
static Class autoreleasePool = Nil;

static SEL cxx_construct = NULL;
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/* References for static linking */
void _references_to_categories_of_OFObject(void)
{
	_OFObject_Serialization_reference = 1;
}

#ifdef OF_OLD_GNU_RUNTIME
/*
 * The old GNU runtime is missing functions for changing methods at runtime. It
 * does not even offer a function to update the dtable, so we have to do even
 * that manually. A well designed runtime would not even allow us to touch the
 * dtable, but the old GNU runtime is that crappy that it even forces us to
 * touch it...
 */
static void
update_dtable(Class class)
{
	MethodList_t iter;
	Class subclass;

	for (subclass = class->subclass_list; subclass != Nil;
	    subclass = subclass->sibling_class)
		update_dtable(subclass);

	for (iter = class->methods; iter != NULL; iter = iter->method_next) {
		Method_t methods = iter->method_list;
		int i;

		for (i = 0; i < iter->method_count; i++)
			if (sarray_get_safe(class->dtable,
			    (sidx)methods[i].method_name->sel_id) != NULL)
				sarray_at_put_safe(class->dtable,
				    (sidx)methods[i].method_name->sel_id,
				    methods[i].method_imp);
	}
}
#endif

@implementation OFObject
+ (void)load
{
#ifdef NEED_OBJC_SYNC_INIT
	if (!objc_sync_init()) {
		fputs("Runtime error: objc_sync_init() failed!\n", stderr);
		abort();








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/* References for static linking */
void _references_to_categories_of_OFObject(void)
{
	_OFObject_Serialization_reference = 1;
}

































@implementation OFObject
+ (void)load
{
#ifdef NEED_OBJC_SYNC_INIT
	if (!objc_sync_init()) {
		fputs("Runtime error: objc_sync_init() failed!\n", stderr);
		abort();
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			if (sel_eq(iter->method_list[i].method_name,
			    selector)) {
				IMP oldImp;

				oldImp = iter->method_list[i].method_imp;
				iter->method_list[i].method_imp = newImp;


				update_dtable((Class)self->class_pointer);

				return oldImp;
			}
	}

	assert([self addClassMethod: selector
		   withTypeEncoding: method->method_types








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			if (sel_eq(iter->method_list[i].method_name,
			    selector)) {
				IMP oldImp;

				oldImp = iter->method_list[i].method_imp;
				iter->method_list[i].method_imp = newImp;

				__objc_update_dispatch_table_for_class(
				    (Class)self->class_pointer);

				return oldImp;
			}
	}

	assert([self addClassMethod: selector
		   withTypeEncoding: method->method_types
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			if (sel_eq(iter->method_list[i].method_name,
			    selector)) {
				IMP oldImp;

				oldImp = iter->method_list[i].method_imp;
				iter->method_list[i].method_imp = newImp;

				update_dtable(self);

				return oldImp;
			}
	}

	assert([self addInstanceMethod: selector
		      withTypeEncoding: method->method_types








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			if (sel_eq(iter->method_list[i].method_name,
			    selector)) {
				IMP oldImp;

				oldImp = iter->method_list[i].method_imp;
				iter->method_list[i].method_imp = newImp;

				__objc_update_dispatch_table_for_class(self);

				return oldImp;
			}
	}

	assert([self addInstanceMethod: selector
		      withTypeEncoding: method->method_types
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	methodList->method_list[0].method_name = selector;
	methodList->method_list[0].method_types = typeEncoding;
	methodList->method_list[0].method_imp = implementation;

	((Class)self)->methods = methodList;

	update_dtable(self);

	return YES;
#else
	@throw [OFNotImplementedException newWithClass: self
					      selector: _cmd];
#endif
}








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	methodList->method_list[0].method_name = selector;
	methodList->method_list[0].method_types = typeEncoding;
	methodList->method_list[0].method_imp = implementation;

	((Class)self)->methods = methodList;

	__objc_update_dispatch_table_for_class(self);

	return YES;
#else
	@throw [OFNotImplementedException newWithClass: self
					      selector: _cmd];
#endif
}
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	methodList->method_list[0].method_name = selector;
	methodList->method_list[0].method_types = typeEncoding;
	methodList->method_list[0].method_imp = implementation;

	((Class)self->class_pointer)->methods = methodList;

	update_dtable((Class)self->class_pointer);

	return YES;
#else
	@throw [OFNotImplementedException newWithClass: self
					      selector: _cmd];
#endif
}








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	methodList->method_list[0].method_name = selector;
	methodList->method_list[0].method_types = typeEncoding;
	methodList->method_list[0].method_imp = implementation;

	((Class)self->class_pointer)->methods = methodList;

	__objc_update_dispatch_table_for_class((Class)self->class_pointer);

	return YES;
#else
	@throw [OFNotImplementedException newWithClass: self
					      selector: _cmd];
#endif
}
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