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84 lines
3.1 KiB
C
84 lines
3.1 KiB
C
/*
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* Copyright (C) 2019 Intel Corporation. All rights reserved.
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* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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*/
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/**
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* @brief This log system supports wrapping multiple outputs into one
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* log message. This is useful for outputting variable-length logs
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* without additional memory overhead (the buffer for concatenating
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* the message), e.g. exception stack trace, which cannot be printed
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* by a single log calling without the help of an additional buffer.
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* Avoiding additional memory buffer is useful for resource-constraint
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* systems. It can minimize the impact of log system on applications
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* and logs can be printed even when no enough memory is available.
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* Functions with prefix "_" are private functions. Only macros that
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* are not start with "_" are exposed and can be used.
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*/
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#ifndef _WASM_LOG_H
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#define _WASM_LOG_H
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#include "bh_platform.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* The following functions are the primitive operations of this log system.
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* A normal usage of the log system is to call wasm_log_begin and then call
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* wasm_log_printf or wasm_log_vprintf one or multiple times and then call
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* wasm_log_end to wrap (mark) the previous outputs into one log message.
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* The wasm_log and macros LOG_ERROR etc. can be used to output log messages
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* by one log calling.
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*/
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int _wasm_log_init (void);
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void _wasm_log_set_verbose_level (int level);
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bool _wasm_log_begin (int level);
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void _wasm_log_printf (const char *fmt, ...);
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void _wasm_log_vprintf (const char *fmt, va_list ap);
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void _wasm_log_end (void);
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void _wasm_log (int level, const char *file, int line,
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const char *fmt, ...);
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#if WASM_ENABLE_LOG != 0
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# define wasm_log_init() _wasm_log_init ()
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# define wasm_log_set_verbose_level(l) _wasm_log_set_verbose_level (l)
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# define wasm_log_begin(l) _wasm_log_begin (l)
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# define wasm_log_printf(...) _wasm_log_printf (__VA_ARGS__)
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# define wasm_log_vprintf(...) _wasm_log_vprintf (__VA_ARGS__)
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# define wasm_log_end() _wasm_log_end ()
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# define wasm_log(...) _wasm_log (__VA_ARGS__)
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#else /* WASM_ENABLE_LOG != 0 */
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# define wasm_log_init() 0
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# define wasm_log_set_verbose_level(l) (void)0
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# define wasm_log_begin() false
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# define wasm_log_printf(...) (void)0
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# define wasm_log_vprintf(...) (void)0
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# define wasm_log_end() (void)0
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# define wasm_log(...) (void)0
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#endif /* WASM_ENABLE_LOG != 0 */
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#define LOG_ERROR(...) wasm_log (0, NULL, 0, __VA_ARGS__)
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#define LOG_WARNING(...) wasm_log (1, NULL, 0, __VA_ARGS__)
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#define LOG_VERBOSE(...) wasm_log (2, NULL, 0, __VA_ARGS__)
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#if defined(WASM_DEBUG)
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# define LOG_DEBUG(...) _wasm_log (1, __FILE__, __LINE__, __VA_ARGS__)
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#else /* defined(WASM_DEBUG) */
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# define LOG_DEBUG(...) (void)0
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#endif /* defined(WASM_DEBUG) */
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#define LOG_PROFILE_HEAP_GC(heap, size) \
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LOG_VERBOSE("PROF.HEAP.GC: HEAP=%08X SIZE=%d", heap, size)
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#ifdef __cplusplus
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}
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#endif
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#endif /* _WASM_LOG_H */
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