VM: Refactor alien.cpp to Factor style
Erik Charlebois
parent
6c919e7d72
commit
22014f092e
75
vm/alien.cpp
75
vm/alien.cpp
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@ -1,16 +1,12 @@
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#include "master.hpp"
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namespace factor
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{
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namespace factor {
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/* gets the address of an object representing a C pointer, with the
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intention of storing the pointer across code which may potentially GC. */
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char *factor_vm::pinned_alien_offset(cell obj)
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{
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switch(tagged<object>(obj).type())
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{
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case ALIEN_TYPE:
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{
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char* factor_vm::pinned_alien_offset(cell obj) {
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switch (tagged<object>(obj).type()) {
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case ALIEN_TYPE: {
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alien* ptr = untag<alien>(obj);
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if (to_boolean(ptr->expired))
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general_error(ERROR_EXPIRED, obj, false_object);
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@ -29,21 +25,18 @@ char *factor_vm::pinned_alien_offset(cell obj)
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/* make an alien */
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/* Allocates memory */
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cell factor_vm::allot_alien(cell delegate_, cell displacement)
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{
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cell factor_vm::allot_alien(cell delegate_, cell displacement) {
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if (displacement == 0)
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return delegate_;
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data_root<object> delegate(delegate_, this);
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data_root<alien> new_alien(allot<alien>(sizeof(alien)), this);
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if(delegate.type_p(ALIEN_TYPE))
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{
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if (delegate.type_p(ALIEN_TYPE)) {
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tagged<alien> delegate_alien = delegate.as<alien>();
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displacement += delegate_alien->displacement;
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new_alien->base = delegate_alien->base;
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}
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else
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} else
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new_alien->base = delegate.value();
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new_alien->displacement = displacement;
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@ -54,20 +47,17 @@ cell factor_vm::allot_alien(cell delegate_, cell displacement)
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}
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/* Allocates memory */
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cell factor_vm::allot_alien(void *address)
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{
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cell factor_vm::allot_alien(void* address) {
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return allot_alien(false_object, (cell) address);
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}
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/* make an alien pointing at an offset of another alien */
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/* Allocates memory */
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void factor_vm::primitive_displaced_alien()
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{
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void factor_vm::primitive_displaced_alien() {
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cell alien = ctx->pop();
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cell displacement = to_cell(ctx->pop());
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switch(tagged<object>(alien).type())
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{
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switch (tagged<object>(alien).type()) {
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case BYTE_ARRAY_TYPE:
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case ALIEN_TYPE:
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case F_TYPE:
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@ -82,26 +72,22 @@ void factor_vm::primitive_displaced_alien()
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/* address of an object representing a C pointer. Explicitly throw an error
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if the object is a byte array, as a sanity check. */
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/* Allocates memory (from_unsigned_cell can allocate) */
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void factor_vm::primitive_alien_address()
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{
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void factor_vm::primitive_alien_address() {
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ctx->replace(from_unsigned_cell((cell) pinned_alien_offset(ctx->peek())));
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}
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/* pop ( alien n ) from datastack, return alien's address plus n */
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void *factor_vm::alien_pointer()
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{
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void* factor_vm::alien_pointer() {
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fixnum offset = to_fixnum(ctx->pop());
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return alien_offset(ctx->pop()) + offset;
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}
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/* define words to read/write values at an alien address */
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#define DEFINE_ALIEN_ACCESSOR(name, type, from, to) \
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VM_C_API void primitive_alien_##name(factor_vm *parent) \
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{ \
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VM_C_API void primitive_alien_##name(factor_vm * parent) { \
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parent->ctx->push(parent->from(*(type*)(parent->alien_pointer()))); \
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} \
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VM_C_API void primitive_set_alien_##name(factor_vm *parent) \
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{ \
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VM_C_API void primitive_set_alien_##name(factor_vm * parent) { \
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type* ptr = (type*)parent->alien_pointer(); \
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type value = (type) parent->to(parent->ctx->pop()); \
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*ptr = value; \
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@ -110,8 +96,7 @@ void *factor_vm::alien_pointer()
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EACH_ALIEN_PRIMITIVE(DEFINE_ALIEN_ACCESSOR)
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/* open a native library and push a handle */
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void factor_vm::primitive_dlopen()
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{
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void factor_vm::primitive_dlopen() {
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data_root<byte_array> path(ctx->pop(), this);
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path.untag_check(this);
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data_root<dll> library(allot<dll>(sizeof(dll)), this);
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@ -122,60 +107,52 @@ void factor_vm::primitive_dlopen()
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/* look up a symbol in a native library */
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/* Allocates memory */
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void factor_vm::primitive_dlsym()
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{
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void factor_vm::primitive_dlsym() {
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data_root<object> library(ctx->pop(), this);
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data_root<byte_array> name(ctx->peek(), this);
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name.untag_check(this);
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symbol_char* sym = name->data<symbol_char>();
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if(to_boolean(library.value()))
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{
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if (to_boolean(library.value())) {
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dll* d = untag_check<dll>(library.value());
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if (d->handle == NULL)
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ctx->replace(false_object);
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else
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ctx->replace(allot_alien(ffi_dlsym(d, sym)));
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}
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else
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} else
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ctx->replace(allot_alien(ffi_dlsym(NULL, sym)));
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}
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/* look up a symbol in a native library */
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/* Allocates memory */
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void factor_vm::primitive_dlsym_raw()
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{
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void factor_vm::primitive_dlsym_raw() {
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data_root<object> library(ctx->pop(), this);
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data_root<byte_array> name(ctx->peek(), this);
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name.untag_check(this);
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symbol_char* sym = name->data<symbol_char>();
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if(to_boolean(library.value()))
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{
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if (to_boolean(library.value())) {
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dll* d = untag_check<dll>(library.value());
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if (d->handle == NULL)
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ctx->replace(false_object);
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else
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ctx->replace(allot_alien(ffi_dlsym_raw(d, sym)));
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}
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else
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} else
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ctx->replace(allot_alien(ffi_dlsym_raw(NULL, sym)));
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}
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/* close a native library handle */
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void factor_vm::primitive_dlclose()
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{
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void factor_vm::primitive_dlclose() {
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dll* d = untag_check<dll>(ctx->pop());
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if (d->handle != NULL)
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ffi_dlclose(d);
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}
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void factor_vm::primitive_dll_validp()
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{
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void factor_vm::primitive_dll_validp() {
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cell library = ctx->peek();
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if (to_boolean(library))
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ctx->replace(tag_boolean(untag_check<dll>(library)->handle != NULL));
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@ -184,10 +161,8 @@ void factor_vm::primitive_dll_validp()
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}
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/* gets the address of an object representing a C pointer */
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char *factor_vm::alien_offset(cell obj)
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{
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switch(tagged<object>(obj).type())
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{
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char* factor_vm::alien_offset(cell obj) {
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switch (tagged<object>(obj).type()) {
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case BYTE_ARRAY_TYPE:
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return untag<byte_array>(obj)->data<char>();
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case ALIEN_TYPE:
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