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64 lines
1.5 KiB
64 lines
1.5 KiB
#include <string.h> |
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#include <stdio.h> |
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#include "config.h" |
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/** |
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* compiler - macros for common compiler extensions |
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* |
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* Abstracts away some compiler hints. Currently these include: |
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* - COLD |
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* For functions not called in fast paths (aka. cold functions) |
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* - PRINTF_FMT |
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* For functions which take printf-style parameters. |
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* - IDEMPOTENT |
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* For functions which return the same value for same parameters. |
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* - NEEDED |
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* For functions and variables which must be emitted even if unused. |
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* - UNNEEDED |
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* For functions and variables which need not be emitted if unused. |
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* - UNUSED |
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* For parameters which are not used. |
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* - IS_COMPILE_CONSTANT |
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* For using different tradeoffs for compiletime vs runtime evaluation. |
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* |
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* License: LGPL (3 or any later version) |
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* Author: Rusty Russell <rusty@rustcorp.com.au> |
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* |
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* Example: |
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* #include <ccan/compiler/compiler.h> |
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* #include <stdio.h> |
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* #include <stdarg.h> |
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* |
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* // Example of a (slow-path) logging function. |
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* static int log_threshold = 2; |
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* static void COLD PRINTF_FMT(2,3) |
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* logger(int level, const char *fmt, ...) |
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* { |
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* va_list ap; |
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* va_start(ap, fmt); |
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* if (level >= log_threshold) |
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* vfprintf(stderr, fmt, ap); |
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* va_end(ap); |
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* } |
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* |
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* int main(int argc, char *argv[]) |
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* { |
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* if (argc != 1) { |
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* logger(3, "Don't want %i arguments!\n", argc-1); |
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* return 1; |
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* } |
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* return 0; |
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* } |
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*/ |
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int main(int argc, char *argv[]) |
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{ |
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/* Expect exactly one argument */ |
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if (argc != 2) |
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return 1; |
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if (strcmp(argv[1], "depends") == 0) { |
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return 0; |
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} |
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return 1; |
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}
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