/*
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* Copyright (C) 2010 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#pragma once
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#include <sys/cdefs.h>
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#include <stdarg.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <stdlib.h>
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// This file is an alternative to <android/log.h>, but reuses
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// `android_LogPriority` and should not have conflicting identifiers.
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#include <android/log.h>
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// These functions do not allocate memory to send data to the log.
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__BEGIN_DECLS
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// Formats a message to the log (priority 'fatal'), then aborts.
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// Implemented as a macro so that async_safe_fatal isn't on the stack when we crash:
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// we appear to go straight from the caller to abort, saving an uninteresting stack
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// frame.
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#define async_safe_fatal(...) \
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do { \
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async_safe_fatal_no_abort(__VA_ARGS__); \
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abort(); \
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} while (0) \
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// These functions do return, so callers that want to abort, must do so themselves,
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// or use the macro above.
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void async_safe_fatal_no_abort(const char* fmt, ...) __printflike(1, 2);
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void async_safe_fatal_va_list(const char* prefix, const char* fmt, va_list args);
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//
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// Formatting routines for the C library's internal debugging.
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// Unlike the usual alternatives, these don't allocate, and they don't drag in all of stdio.
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// These are async signal safe, so they can be called from signal handlers.
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//
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int async_safe_format_buffer(char* buf, size_t size, const char* fmt, ...) __printflike(3, 4);
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int async_safe_format_buffer_va_list(char* buffer, size_t buffer_size, const char* format, va_list args);
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int async_safe_format_fd(int fd, const char* format , ...) __printflike(2, 3);
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int async_safe_format_fd_va_list(int fd, const char* format, va_list args);
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int async_safe_format_log(int priority, const char* tag, const char* fmt, ...) __printflike(3, 4);
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int async_safe_format_log_va_list(int priority, const char* tag, const char* fmt, va_list ap);
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int async_safe_write_log(int priority, const char* tag, const char* msg);
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__END_DECLS
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