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Correctly pass arguments for fastcalls

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Inori 2019-08-10 12:39:23 -04:00 • committed by Inori
parent ecda9bfb36
commit c7fafb2316
1 changed files with 21 additions and 6 deletions
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27
binding/miniffi-binding.cpp
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@ -4,7 +4,6 @@
#include <SDL.h>
#if defined(__WIN32__) && defined(USE_ESSENTIALS_FIXES)
#include <windows.h>
#include "sharedstate.h"
#include "fake-api.h"
#endif
@ -18,10 +17,20 @@
// Might need to let MiniFFI.initialize set calling convention
// as an optional arg, this won't work with everything
// Maybe libffi would help out with this
// Only using 8 max args instead of 16 to reduce the time taken
// to set all those variables up and ease the eyesore, and I don't
// think there are many functions one would need to use that require
// that many arguments anyway
// stdcall is easy, everything in a struct gets pushed to the stack
#ifdef __WIN32__
typedef void* (__stdcall *MINIFFI_FUNC)(...);
#else
typedef void* (*MINIFFI_FUNC)(...);
// L O N G, but variables won't get set up correctly otherwise
// should allow for __fastcalls (macOS likes these) and whatever else
typedef void* (*MINIFFI_FUNC)(unsigned long,unsigned long,unsigned long,unsigned long,unsigned long,unsigned long,unsigned long,unsigned long);
#endif
// MiniFFI class, also named Win32API on Windows
@ -55,6 +64,9 @@ MiniFFI_GetFunctionHandle(void *lib, const char *func)
return SDL_LoadFunction(lib, func);
}
// MiniFFI.new(library, function[, imports[, exports]])
// Yields itself in blocks
RB_METHOD(MiniFFI_initialize)
{
VALUE libname, func, imports, exports;
@ -133,7 +145,7 @@ RB_METHOD(MiniFFI_initialize)
break;
}
if (16 < RARRAY_LEN(ary_imports))
if (8 < RARRAY_LEN(ary_imports))
rb_raise(rb_eRuntimeError, "too many parameters: %ld\n", RARRAY_LEN(ary_imports));
rb_iv_set(self, "_imports", ary_imports);
@ -172,7 +184,7 @@ RB_METHOD(MiniFFI_initialize)
RB_METHOD(MiniFFI_call)
{
struct {
unsigned long params[16];
unsigned long params[8];
} param;
#define params param.params
VALUE func = rb_iv_get(self, "_func");
@ -215,8 +227,11 @@ RB_METHOD(MiniFFI_call)
}
params[i] = lParam;
}
#ifdef __WIN32__
unsigned long ret = (unsigned long)ApiFunction(param);
#else
unsigned long ret = (unsigned long)ApiFunction(params[0],params[1],params[2],params[3],params[4],params[5],params[6],params[7]);
#endif
switch (FIX2INT(own_exports))
{
@ -238,7 +253,7 @@ MiniFFIBindingInit()
VALUE cMiniFFI = rb_define_class("MiniFFI", rb_cObject);
rb_define_alloc_func(cMiniFFI, MiniFFI_alloc);
_rb_define_method(cMiniFFI, "initialize", MiniFFI_initialize);
rb_define_method(cMiniFFI, "call", RUBY_METHOD_FUNC(MiniFFI_call), -1);
_rb_define_method(cMiniFFI, "call", MiniFFI_call);
rb_define_alias(cMiniFFI, "Call", "call");
#ifdef __WIN32__