VALUE
rbffi_CallFunction(int argc, VALUE* argv, void* function, FunctionType* fnInfo)
{
void* retval;
void** ffiValues;
FFIStorage* params;
VALUE rbReturnValue;
rbffi_frame_t frame = { 0 };
retval = alloca(MAX(fnInfo->ffi_cif.rtype->size, FFI_SIZEOF_ARG));
if (unlikely(fnInfo->blocking)) {
BlockingCall* bc;
/*
* due to the way thread switching works on older ruby variants, we
* cannot allocate anything passed to the blocking function on the stack
*/
#if defined(HAVE_RB_THREAD_BLOCKING_REGION) || defined(HAVE_RB_THREAD_CALL_WITHOUT_GVL)
ffiValues = ALLOCA_N(void *, fnInfo->parameterCount);
params = ALLOCA_N(FFIStorage, fnInfo->parameterCount);
bc = ALLOCA_N(BlockingCall, 1);
bc->retval = retval;
#else
ffiValues = ALLOC_N(void *, fnInfo->parameterCount);
params = ALLOC_N(FFIStorage, fnInfo->parameterCount);
bc = ALLOC_N(BlockingCall, 1);
bc->retval = xmalloc(MAX(fnInfo->ffi_cif.rtype->size, FFI_SIZEOF_ARG));
bc->stkretval = retval;
#endif
bc->info = fnInfo;
bc->function = function;
bc->ffiValues = ffiValues;
bc->params = params;
bc->frame = &frame;
rbffi_SetupCallParams(argc, argv,
fnInfo->parameterCount, fnInfo->parameterTypes, params, ffiValues,
fnInfo->callbackParameters, fnInfo->callbackCount, fnInfo->rbEnums);
rbffi_frame_push(&frame);
rb_rescue2(do_blocking_call, (VALUE) bc, save_frame_exception, (VALUE) &frame, rb_eException, (VALUE) 0);
rbffi_frame_pop(&frame);
#if !(defined(HAVE_RB_THREAD_BLOCKING_REGION) || defined(HAVE_RB_THREAD_CALL_WITHOUT_GVL))
memcpy(bc->stkretval, bc->retval, MAX(bc->info->ffi_cif.rtype->size, FFI_SIZEOF_ARG));
xfree(bc->params);
xfree(bc->ffiValues);
xfree(bc->retval);
xfree(bc);
#endif
} else {
static VALUE
variadic_invoke(VALUE self, VALUE parameterTypes, VALUE parameterValues)
{
VariadicInvoker* invoker;
FFIStorage* params;
void* retval;
ffi_cif cif;
void** ffiValues;
ffi_type** ffiParamTypes;
ffi_type* ffiReturnType;
Type** paramTypes;
VALUE* argv;
int paramCount = 0, fixedCount = 0, i;
ffi_status ffiStatus;
rbffi_frame_t frame = { 0 };
Check_Type(parameterTypes, T_ARRAY);
Check_Type(parameterValues, T_ARRAY);
Data_Get_Struct(self, VariadicInvoker, invoker);
paramCount = (int) RARRAY_LEN(parameterTypes);
paramTypes = ALLOCA_N(Type *, paramCount);
ffiParamTypes = ALLOCA_N(ffi_type *, paramCount);
params = ALLOCA_N(FFIStorage, paramCount);
ffiValues = ALLOCA_N(void*, paramCount);
argv = ALLOCA_N(VALUE, paramCount);
retval = alloca(MAX(invoker->returnType->ffiType->size, FFI_SIZEOF_ARG));
for (i = 0; i < paramCount; ++i) {
VALUE rbType = rb_ary_entry(parameterTypes, i);
if (!rb_obj_is_kind_of(rbType, rbffi_TypeClass)) {
rb_raise(rb_eTypeError, "wrong type. Expected (FFI::Type)");
}
Data_Get_Struct(rbType, Type, paramTypes[i]);
switch (paramTypes[i]->nativeType) {
case NATIVE_INT8:
case NATIVE_INT16:
case NATIVE_INT32:
rbType = rb_const_get(rbffi_TypeClass, rb_intern("INT32"));
Data_Get_Struct(rbType, Type, paramTypes[i]);
break;
case NATIVE_UINT8:
case NATIVE_UINT16:
case NATIVE_UINT32:
rbType = rb_const_get(rbffi_TypeClass, rb_intern("UINT32"));
Data_Get_Struct(rbType, Type, paramTypes[i]);
break;
case NATIVE_FLOAT32:
rbType = rb_const_get(rbffi_TypeClass, rb_intern("DOUBLE"));
Data_Get_Struct(rbType, Type, paramTypes[i]);
break;
default:
break;
}
ffiParamTypes[i] = paramTypes[i]->ffiType;
if (ffiParamTypes[i] == NULL) {
rb_raise(rb_eArgError, "Invalid parameter type #%x", paramTypes[i]->nativeType);
}
argv[i] = rb_ary_entry(parameterValues, i);
}
ffiReturnType = invoker->returnType->ffiType;
if (ffiReturnType == NULL) {
rb_raise(rb_eArgError, "Invalid return type");
}
/*Get the number of fixed args from @fixed array*/
fixedCount = RARRAY_LEN(rb_iv_get(self, "@fixed"));
#ifdef HAVE_FFI_PREP_CIF_VAR
ffiStatus = ffi_prep_cif_var(&cif, invoker->abi, fixedCount, paramCount, ffiReturnType, ffiParamTypes);
#else
ffiStatus = ffi_prep_cif(&cif, invoker->abi, paramCount, ffiReturnType, ffiParamTypes);
#endif
switch (ffiStatus) {
case FFI_BAD_ABI:
rb_raise(rb_eArgError, "Invalid ABI specified");
case FFI_BAD_TYPEDEF:
rb_raise(rb_eArgError, "Invalid argument type specified");
case FFI_OK:
break;
default:
rb_raise(rb_eArgError, "Unknown FFI error");
}
rbffi_SetupCallParams(paramCount, argv, -1, paramTypes, params,
ffiValues, NULL, 0, invoker->rbEnums);
rbffi_frame_push(&frame);
ffi_call(&cif, FFI_FN(invoker->function), retval, ffiValues);
rbffi_frame_pop(&frame);
rbffi_save_errno();
if (RTEST(frame.exc) && frame.exc != Qnil) {
rb_exc_raise(frame.exc);
}
return rbffi_NativeValue_ToRuby(invoker->returnType, invoker->rbReturnType, retval);
}
static VALUE
variadic_invoke(VALUE self, VALUE parameterTypes, VALUE parameterValues)
{
VariadicInvoker* invoker;
FFIStorage* params;
void* retval;
ffi_cif cif;
void** ffiValues;
ffi_type** ffiParamTypes;
ffi_type* ffiReturnType;
Type** paramTypes;
VALUE* argv;
int paramCount = 0, fixedCount = 0, i;
ffi_status ffiStatus;
rbffi_frame_t frame = { 0 };
Check_Type(parameterTypes, T_ARRAY);
Check_Type(parameterValues, T_ARRAY);
Data_Get_Struct(self, VariadicInvoker, invoker);
paramCount = (int) RARRAY_LEN(parameterTypes);
paramTypes = ALLOCA_N(Type *, paramCount);
ffiParamTypes = ALLOCA_N(ffi_type *, paramCount);
params = ALLOCA_N(FFIStorage, paramCount);
ffiValues = ALLOCA_N(void*, paramCount);
argv = ALLOCA_N(VALUE, paramCount);
retval = alloca(MAX(invoker->returnType->ffiType->size, FFI_SIZEOF_ARG));
for (i = 0; i < paramCount; ++i) {
VALUE rbType = rb_ary_entry(parameterTypes, i);
if (!rb_obj_is_kind_of(rbType, rbffi_TypeClass)) {
rb_raise(rb_eTypeError, "wrong type. Expected (FFI::Type)");
}
Data_Get_Struct(rbType, Type, paramTypes[i]);
switch (paramTypes[i]->nativeType) {
case NATIVE_INT8:
case NATIVE_INT16:
case NATIVE_INT32:
rbType = rb_const_get(rbffi_TypeClass, rb_intern("INT32"));
Data_Get_Struct(rbType, Type, paramTypes[i]);
break;
case NATIVE_UINT8:
case NATIVE_UINT16:
case NATIVE_UINT32:
rbType = rb_const_get(rbffi_TypeClass, rb_intern("UINT32"));
Data_Get_Struct(rbType, Type, paramTypes[i]);
break;
case NATIVE_FLOAT32:
rbType = rb_const_get(rbffi_TypeClass, rb_intern("DOUBLE"));
Data_Get_Struct(rbType, Type, paramTypes[i]);
break;
default:
break;
}
ffiParamTypes[i] = paramTypes[i]->ffiType;
if (ffiParamTypes[i] == NULL) {
rb_raise(rb_eArgError, "Invalid parameter type #%x", paramTypes[i]->nativeType);
}
argv[i] = rb_ary_entry(parameterValues, i);
}
ffiReturnType = invoker->returnType->ffiType;
if (ffiReturnType == NULL) {
rb_raise(rb_eArgError, "Invalid return type");
}
/*Get the number of fixed args from @fixed array*/
fixedCount = RARRAY_LEN(rb_iv_get(self, "@fixed"));
#ifdef HAVE_FFI_PREP_CIF_VAR
ffiStatus = ffi_prep_cif_var(&cif, invoker->abi, fixedCount, paramCount, ffiReturnType, ffiParamTypes);
#else
ffiStatus = ffi_prep_cif(&cif, invoker->abi, paramCount, ffiReturnType, ffiParamTypes);
#endif
switch (ffiStatus) {
case FFI_BAD_ABI:
rb_raise(rb_eArgError, "Invalid ABI specified");
case FFI_BAD_TYPEDEF:
rb_raise(rb_eArgError, "Invalid argument type specified");
case FFI_OK:
break;
default:
rb_raise(rb_eArgError, "Unknown FFI error");
}
rbffi_SetupCallParams(paramCount, argv, -1, paramTypes, params,
ffiValues, NULL, 0, invoker->rbEnums);
rbffi_frame_push(&frame);
#ifdef HAVE_RB_THREAD_CALL_WITHOUT_GVL
/* In Call.c, blocking: true is supported on older ruby variants
* without rb_thread_call_without_gvl by allocating on the heap instead
* of the stack. Since this functionality is being added later,
* we’re skipping support for old rubies here. */
if(unlikely(invoker->blocking)) {
rbffi_blocking_call_t* bc;
bc = ALLOCA_N(rbffi_blocking_call_t, 1);
bc->retval = retval;
bc->function = invoker->function;
bc->ffiValues = ffiValues;
bc->params = params;
bc->frame = &frame;
bc->cif = cif;
rb_rescue2(rbffi_do_blocking_call, (VALUE) bc, rbffi_save_frame_exception, (VALUE) &frame, rb_eException, (VALUE) 0);
} else {
ffi_call(&cif, FFI_FN(invoker->function), retval, ffiValues);
}
#else
ffi_call(&cif, FFI_FN(invoker->function), retval, ffiValues);
#endif
rbffi_frame_pop(&frame);
rbffi_save_errno();
if (RTEST(frame.exc) && frame.exc != Qnil) {
rb_exc_raise(frame.exc);
}
return rbffi_NativeValue_ToRuby(invoker->returnType, invoker->rbReturnType, retval);
}