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jerryscript/jerry-core/jrt/jrt.h
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Dániel Bátyai ac1c48eeff Update jerry-port and jerry-ext (#4907) 
Notable changes:
  - Updated and the port API interface, new functions have been added
    and some have been changed. The port library is now cleaned up to
    not have any dependency on jerry-core, as it should be. The port library
    is now strictly a collection of functions that implement
    embedding/platform specific behavior.
  - The default port implementation has been split for windows and unix.
    Implemented port functions have been categorized and reorganized,
    and marked with attribute((weak)) for better reusability.
  - External context allocation has been moved to the port API instead
    of a core API callback. The iterface has also been extended with a
    function to free the allocated context. When external context is
    enabled, jerry_init now automatically calls the port implementation
    to allocate the context and jerry_cleanup automatically calls the port
    to free the context.
  - jerry_port_log has been changed to no longer require formatting to
    be implemented by the port. The reason beind this is that it was vague what
    format specifiers were used by the engine, and in what manner. The port
    function now takes a zero-terminated string, and should only implement
    how the string should be logged.
  - Logging and log message formatting is now handled by the core jerry library
    where it can be implemented as necessary. Logging can be done through a new
    core API function, which uses the port to output the final log message.
  - Log level has been moved into jerry-core, and an API function has
    been added to set the log level. It should be the library that
    filters log messages based on the requested log level, instead of
    logging everything and requiring the user to do so.
  - Module resolving logic has been moved into jerry-core. There's no
    reason to have it in the port library and requiring embedders to
    duplicate the code. It also added an unnecessary dependency on
    jerry-core to the port. Platform specific behavior is still used through
    the port API, like resolving module specifiers, and reading source file
    contents. If necessary, the resolving logic can still be overridden as
    previously.
  - The jerry-ext library has also been cleaned up, and many utility
    functions have been added that previously were implemented in
    jerry-main. This allows easier reusability for some common operations,
    like printing unhandled exceptions or providing a repl console.
  - Debugger interaction with logged/printed messages has been fixed, so
    that it's no longer the port implementations responsibility to send
    the output to the debugger, as the port should have no notion of what a
    debugger is.  The printing and logging functions will now pass the
    result message to the debugger, if connected.
  - Cleaned up TZA handling in the date port implementation, and simplified
    the API function prototype.
  - Moved property access helper functions that use ASCII strings as
    keys from jerry-ext to the core API.

JerryScript-DCO-1.0-Signed-off-by: Dániel Bátyai dbatyai@inf.u-szeged.hu
2022-01-20 13:53:47 +01:00

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/* Copyright JS Foundation and other contributors, http://js.foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef JRT_H
#define JRT_H
#include <stdio.h>
#include <string.h>
#include "jerryscript-core.h"
#include "jerryscript-port.h"
#include "config.h"
#include "jrt-types.h"
/*
* Constants
*/
#define JERRY_BITSINBYTE 8
/*
* Make sure unused parameters, variables, or expressions trigger no compiler warning.
*/
#define JERRY_UNUSED(x) ((void) (x))
#define JERRY_UNUSED_1(_1) JERRY_UNUSED (_1)
#define JERRY_UNUSED_2(_1, _2) JERRY_UNUSED (_1), JERRY_UNUSED_1 (_2)
#define JERRY_UNUSED_3(_1, _2, _3) JERRY_UNUSED (_1), JERRY_UNUSED_2 (_2, _3)
#define JERRY_UNUSED_4(_1, _2, _3, _4) JERRY_UNUSED (_1), JERRY_UNUSED_3 (_2, _3, _4)
#define JERRY_UNUSED_5(_1, _2, _3, _4, _5) JERRY_UNUSED (_1), JERRY_UNUSED_4 (_2, _3, _4, _5)
#define JERRY_UNUSED_6(_1, _2, _3, _4, _5, _6) JERRY_UNUSED (_1), JERRY_UNUSED_5 (_2, _3, _4, _5, _6)
#define JERRY_UNUSED_7(_1, _2, _3, _4, _5, _6, _7) JERRY_UNUSED (_1), JERRY_UNUSED_6 (_2, _3, _4, _5, _6, _7)
#define JERRY_UNUSED_8(_1, _2, _3, _4, _5, _6, _7, _8) JERRY_UNUSED (_1), JERRY_UNUSED_7 (_2, _3, _4, _5, _6, _7, _8)
#define JERRY_VA_ARGS_NUM_IMPL(_1, _2, _3, _4, _5, _6, _7, _8, N, ...) N
#define JERRY_VA_ARGS_NUM(...) JERRY_VA_ARGS_NUM_IMPL (__VA_ARGS__, 8, 7, 6, 5, 4, 3, 2, 1, 0)
#define JERRY_UNUSED_ALL_IMPL_(nargs) JERRY_UNUSED_##nargs
#define JERRY_UNUSED_ALL_IMPL(nargs) JERRY_UNUSED_ALL_IMPL_ (nargs)
#define JERRY_UNUSED_ALL(...) JERRY_UNUSED_ALL_IMPL (JERRY_VA_ARGS_NUM (__VA_ARGS__)) (__VA_ARGS__)
/*
* Asserts
*
* Warning:
* Don't use JERRY_STATIC_ASSERT in headers, because
* __LINE__ may be the same for asserts in a header
* and in an implementation file.
*/
#define JERRY_STATIC_ASSERT_GLUE_(a, b, c) a##b##_##c
#define JERRY_STATIC_ASSERT_GLUE(a, b, c) JERRY_STATIC_ASSERT_GLUE_ (a, b, c)
#define JERRY_STATIC_ASSERT(x, msg) \
enum \
{ \
JERRY_STATIC_ASSERT_GLUE (static_assertion_failed_, __LINE__, msg) = 1 / (!!(x)) \
}
#ifndef JERRY_NDEBUG
void JERRY_ATTR_NORETURN jerry_assert_fail (const char *assertion,
const char *file,
const char *function,
const uint32_t line);
void JERRY_ATTR_NORETURN jerry_unreachable (const char *file, const char *function, const uint32_t line);
#define JERRY_ASSERT(x) \
do \
{ \
if (JERRY_UNLIKELY (!(x))) \
{ \
jerry_assert_fail (#x, __FILE__, __func__, __LINE__); \
} \
} while (0)
#define JERRY_UNREACHABLE() \
do \
{ \
jerry_unreachable (__FILE__, __func__, __LINE__); \
} while (0)
#else /* JERRY_NDEBUG */
#define JERRY_ASSERT(x) \
do \
{ \
if (false) \
{ \
JERRY_UNUSED (x); \
} \
} while (0)
#ifdef __GNUC__
#define JERRY_UNREACHABLE() __builtin_unreachable ()
#endif /* __GNUC__ */
#ifdef _MSC_VER
#define JERRY_UNREACHABLE() _assume (0)
#endif /* _MSC_VER */
#ifndef JERRY_UNREACHABLE
#define JERRY_UNREACHABLE()
#endif /* !JERRY_UNREACHABLE */
#endif /* !JERRY_NDEBUG */
/**
* Exit on fatal error
*/
void JERRY_ATTR_NORETURN jerry_fatal (jerry_fatal_code_t code);
/*
* Logging
*/
#if JERRY_LOGGING
#define JERRY_ERROR_MSG(...) jerry_log (JERRY_LOG_LEVEL_ERROR, __VA_ARGS__)
#define JERRY_WARNING_MSG(...) jerry_log (JERRY_LOG_LEVEL_WARNING, __VA_ARGS__)
#define JERRY_DEBUG_MSG(...) jerry_log (JERRY_LOG_LEVEL_DEBUG, __VA_ARGS__)
#define JERRY_TRACE_MSG(...) jerry_log (JERRY_LOG_LEVEL_TRACE, __VA_ARGS__)
#else /* !JERRY_LOGGING */
#define JERRY_ERROR_MSG(...) \
do \
{ \
if (false) \
{ \
JERRY_UNUSED_ALL (__VA_ARGS__); \
} \
} while (0)
#define JERRY_WARNING_MSG(...) \
do \
{ \
if (false) \
{ \
JERRY_UNUSED_ALL (__VA_ARGS__); \
} \
} while (0)
#define JERRY_DEBUG_MSG(...) \
do \
{ \
if (false) \
{ \
JERRY_UNUSED_ALL (__VA_ARGS__); \
} \
} while (0)
#define JERRY_TRACE_MSG(...) \
do \
{ \
if (false) \
{ \
JERRY_UNUSED_ALL (__VA_ARGS__); \
} \
} while (0)
#endif /* JERRY_LOGGING */
/**
* Size of struct member
*/
#define JERRY_SIZE_OF_STRUCT_MEMBER(struct_name, member_name) sizeof (((struct_name *) NULL)->member_name)
/**
* Aligns @a value to @a alignment. @a must be the power of 2.
*
* Returns minimum positive value, that divides @a alignment and is more than or equal to @a value
*/
#define JERRY_ALIGNUP(value, alignment) (((value) + ((alignment) -1)) & ~((alignment) -1))
/**
* Align value down
*/
#define JERRY_ALIGNDOWN(value, alignment) ((value) & ~((alignment) -1))
/*
* min, max
*/
#define JERRY_MIN(v1, v2) (((v1) < (v2)) ? (v1) : (v2))
#define JERRY_MAX(v1, v2) (((v1) < (v2)) ? (v2) : (v1))
/**
* Calculate the index of the first non-zero bit of a 32 bit integer value
*/
#define JERRY__LOG2_1(n) (((n) >= 2) ? 1 : 0)
#define JERRY__LOG2_2(n) (((n) >= 1 << 2) ? (2 + JERRY__LOG2_1 ((n) >> 2)) : JERRY__LOG2_1 (n))
#define JERRY__LOG2_4(n) (((n) >= 1 << 4) ? (4 + JERRY__LOG2_2 ((n) >> 4)) : JERRY__LOG2_2 (n))
#define JERRY__LOG2_8(n) (((n) >= 1 << 8) ? (8 + JERRY__LOG2_4 ((n) >> 8)) : JERRY__LOG2_4 (n))
#define JERRY_LOG2(n) (((n) >= 1 << 16) ? (16 + JERRY__LOG2_8 ((n) >> 16)) : JERRY__LOG2_8 (n))
/**
* JERRY_BLOCK_TAIL_CALL_OPTIMIZATION
*
* Adapted from abseil ( https://github.com/abseil/ )
*
* Instructs the compiler to avoid optimizing tail-call recursion. This macro is
* useful when you wish to preserve the existing function order within a stack
* trace for logging, debugging, or profiling purposes.
*
* Example:
*
* int f() {
* int result = g();
* JERRY_BLOCK_TAIL_CALL_OPTIMIZATION();
* return result;
* }
*
* This macro is intentionally here as jerryscript-compiler.h is a public header and
* it does not make sense to expose this macro to the public.
*/
#if defined(__clang__) || defined(__GNUC__)
/* Clang/GCC will not tail call given inline volatile assembly. */
#define JERRY_BLOCK_TAIL_CALL_OPTIMIZATION() __asm__ __volatile__("")
#else /* !defined(__clang__) && !defined(__GNUC__) */
/* On GCC 10.x this version also works. */
#define JERRY_BLOCK_TAIL_CALL_OPTIMIZATION() \
do \
{ \
JERRY_CONTEXT (status_flags) |= ECMA_STATUS_API_ENABLED; \
} while (0)
#endif /* defined(__clang__) || defined (__GNUC__) */
#endif /* !JRT_H */
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