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Added __objc_msg_forward...

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Added __objc_msg_forward, a hook that allows external libraries to
provide a function that returns the real forwarding function. This can
alleviate problems __builtin_apply() and friends have on various
platforms. (Solution suggested by Helge Hess.)

Define gen_rtx_REG.

From-SVN: r38650
This commit is contained in:
Ovidiu Predescu 2001-01-03 08:49:02 +00:00
parent 8cb4a04adc
commit 68b61df962
1 changed files with 26 additions and 11 deletions
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37
libobjc/sendmsg.c
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@ -33,6 +33,7 @@ Boston, MA 02111-1307, USA. */
/* this is how we hack STRUCT_VALUE to be 1 or 0 */
#define gen_rtx(args...) 1
#define gen_rtx_MEM(args...) 1
#define gen_rtx_REG(args...) 1
#define rtx int
#if !defined(STRUCT_VALUE) || STRUCT_VALUE == 0
@ -44,6 +45,11 @@ Boston, MA 02111-1307, USA. */
/* The uninstalled dispatch table */
struct sarray* __objc_uninstalled_dtable = 0; /* !T:MUTEX */
/* Hook for method forwarding. If it is set, is invoked to return a
function that performs the real forwarding. Otherwise the libgcc
based functions (__builtin_apply and friends) are used. */
IMP (*__objc_msg_forward)(SEL) = NULL;
/* Send +initialize to class */
static void __objc_send_initialize(Class);
@ -76,18 +82,27 @@ __inline__
IMP
__objc_get_forward_imp (SEL sel)
{
const char *t = sel->sel_types;
if (t && (*t == '[' || *t == '(' || *t == '{')
#ifdef OBJC_MAX_STRUCT_BY_VALUE
&& objc_sizeof_type(t) > OBJC_MAX_STRUCT_BY_VALUE
#endif
)
return (IMP)__objc_block_forward;
else if (t && (*t == 'f' || *t == 'd'))
return (IMP)__objc_double_forward;
if (__objc_msg_forward)
{
IMP result;
if ((result = __objc_msg_forward (sel)))
return result;
}
else
return (IMP)__objc_word_forward;
{
const char *t = sel->sel_types;
if (t && (*t == '[' || *t == '(' || *t == '{')
#ifdef OBJC_MAX_STRUCT_BY_VALUE
&& objc_sizeof_type(t) > OBJC_MAX_STRUCT_BY_VALUE
#endif
)
return (IMP)__objc_block_forward;
else if (t && (*t == 'f' || *t == 'd'))
return (IMP)__objc_double_forward;
else
return (IMP)__objc_word_forward;
}
}
/* Given a class and selector, return the selector's implementation. */