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Merge pull request #11461 from hpvb/add-likely-macros

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Implement Linux-style likely()/unlikely() macros
This commit is contained in:
Rémi Verschelde 2017-09-22 09:15:45 +02:00 committed by GitHub
parent 9906aeb2f8 22358babda
commit be60689812
4 changed files with 24 additions and 15 deletions
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21
core/error_macros.h
View file

@ -30,6 +30,7 @@
#ifndef ERROR_MACROS_H
#define ERROR_MACROS_H
#include "typedefs.h"
/**
* Error macros. Unlike exceptions and asserts, these macros try to mantain consistency and stability
* inside the code. It is recommended to always return processable data, so in case of an error, the
@ -130,7 +131,7 @@ extern bool _err_error_exists;
#define ERR_FAIL_INDEX(m_index, m_size) \
do { \
if ((m_index) < 0 || (m_index) >= (m_size)) { \
if (unlikely((m_index) < 0 || (m_index) >= (m_size))) { \
_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Index " _STR(m_index) " out of size (" _STR(m_size) ")."); \
return; \
} else \
@ -144,7 +145,7 @@ extern bool _err_error_exists;
#define ERR_FAIL_INDEX_V(m_index, m_size, m_retval) \
do { \
if ((m_index) < 0 || (m_index) >= (m_size)) { \
if (unlikely((m_index) < 0 || (m_index) >= (m_size))) { \
_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Index " _STR(m_index) " out of size (" _STR(m_size) ")."); \
return m_retval; \
} else \
@ -156,7 +157,7 @@ extern bool _err_error_exists;
*/
#define CRASH_BAD_INDEX(m_index, m_size) \
do { \
if ((m_index) < 0 || (m_index) >= (m_size)) { \
if (unlikely((m_index) < 0 || (m_index) >= (m_size))) { \
_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "FATAL: Index " _STR(m_index) " out of size (" _STR(m_size) ")."); \
GENERATE_TRAP \
} \
@ -168,7 +169,7 @@ extern bool _err_error_exists;
#define ERR_FAIL_NULL(m_param) \
{ \
if (!m_param) { \
if (unlikely(!m_param)) { \
_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Parameter ' " _STR(m_param) " ' is null."); \
return; \
} else \
@ -177,7 +178,7 @@ extern bool _err_error_exists;
#define ERR_FAIL_NULL_V(m_param, m_retval) \
{ \
if (!m_param) { \
if (unlikely(!m_param)) { \
_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Parameter ' " _STR(m_param) " ' is null."); \
return m_retval; \
} else \
@ -190,7 +191,7 @@ extern bool _err_error_exists;
#define ERR_FAIL_COND(m_cond) \
{ \
if (m_cond) { \
if (unlikely(m_cond)) { \
_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Condition ' " _STR(m_cond) " ' is true."); \
return; \
} else \
@ -202,7 +203,7 @@ extern bool _err_error_exists;
#define CRASH_COND(m_cond) \
{ \
if (m_cond) { \
if (unlikely(m_cond)) { \
_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "FATAL: Condition ' " _STR(m_cond) " ' is true."); \
GENERATE_TRAP \
} \
@ -216,7 +217,7 @@ extern bool _err_error_exists;
#define ERR_FAIL_COND_V(m_cond, m_retval) \
{ \
if (m_cond) { \
if (unlikely(m_cond)) { \
_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Condition ' " _STR(m_cond) " ' is true. returned: " _STR(m_retval)); \
return m_retval; \
} else \
@ -229,7 +230,7 @@ extern bool _err_error_exists;
#define ERR_CONTINUE(m_cond) \
{ \
if (m_cond) { \
if (unlikely(m_cond)) { \
_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Condition ' " _STR(m_cond) " ' is true. Continuing..:"); \
continue; \
} else \
@ -242,7 +243,7 @@ extern bool _err_error_exists;
#define ERR_BREAK(m_cond) \
{ \
if (m_cond) { \
if (unlikely(m_cond)) { \
_err_print_error(FUNCTION_STR, __FILE__, __LINE__, "Condition ' " _STR(m_cond) " ' is true. Breaking..:"); \
break; \
} else \

8
core/typedefs.h
View file

@ -290,4 +290,12 @@ struct _GlobalLock {
#define __STRX(m_index) #m_index
#define __STR(m_index) __STRX(m_index)
#ifdef __GNUC__
#define likely(x) __builtin_expect(!!(x), 1)
#define unlikely(x) __builtin_expect(!!(x), 0)
#else
#define likely(x) x
#define unlikely(x) x
#endif
#endif /* typedefs.h */

4
core/variant.cpp
View file

@ -2469,10 +2469,10 @@ Variant::Variant(const Vector<Color> &p_array) {
void Variant::operator=(const Variant &p_variant) {
if (this == &p_variant)
if (unlikely(this == &p_variant))
return;
if (type != p_variant.type) {
if (unlikely(type != p_variant.type)) {
reference(p_variant);
return;
}

6
modules/gdscript/gd_function.cpp
View file

@ -42,7 +42,7 @@ Variant *GDFunction::_get_variant(int p_address, GDInstance *p_instance, GDScrip
case ADDR_TYPE_SELF: {
if (!p_instance) {
if (unlikely(!p_instance)) {
r_error = "Cannot access self without instance.";
return NULL;
}
@ -54,7 +54,7 @@ Variant *GDFunction::_get_variant(int p_address, GDInstance *p_instance, GDScrip
} break;
case ADDR_TYPE_MEMBER: {
//member indexing is O(1)
if (!p_instance) {
if (unlikely(!p_instance)) {
r_error = "Cannot access member without instance.";
return NULL;
}
@ -279,7 +279,7 @@ Variant GDFunction::call(GDInstance *p_instance, const Variant **p_args, int p_a
#define GET_VARIANT_PTR(m_v, m_code_ofs) \
Variant *m_v; \
m_v = _get_variant(_code_ptr[ip + m_code_ofs], p_instance, _class, self, stack, err_text); \
if (!m_v) \
if (unlikely(!m_v)) \
break;
#else