thodg/libgit2/src/trace.h

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• Hash : b23b112d
  Author :
  Date : 2014-04-29T11:29:49
  

  Add payloads, bitmaps to trace API This is a proposed adjustment to the trace APIs. This makes the trace levels into a bitmask so that they can be selectively enabled and adds a callback-level payload, plus a message-level payload. This makes it easier for me to a GIT_TRACE_PERF callbacks that are simply bypassed if the PERF level is not set.

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• src/trace.h

• /*
   * Copyright (C) the libgit2 contributors. All rights reserved.
   *
   * This file is part of libgit2, distributed under the GNU GPL v2 with
   * a Linking Exception. For full terms see the included COPYING file.
   */
  #ifndef INCLUDE_trace_h__
  #define INCLUDE_trace_h__
  
  #include <git2/trace.h>
  #include "buffer.h"
  
  #ifdef GIT_TRACE
  
  struct git_trace_data {
  	git_trace_level_t level;
  	git_trace_callback callback;
  };
  
  extern struct git_trace_data git_trace__data;
  
  GIT_INLINE(void) git_trace__write_fmt(
  	git_trace_level_t level,
  	const char *fmt, ...)
  {
  	git_trace_callback callback = git_trace__data.callback;
  	git_buf message = GIT_BUF_INIT;
  	va_list ap;
  
  	va_start(ap, fmt);
  	git_buf_vprintf(&message, fmt, ap);
  	va_end(ap);
  
  	callback(level, git_buf_cstr(&message));
  
  	git_buf_free(&message);
  }
  
  #define git_trace_level()		(git_trace__data.level)
  #define git_trace(l, ...)		{ \
  									if (git_trace__data.level >= l && \
  										git_trace__data.callback != NULL) { \
  										git_trace__write_fmt(l, __VA_ARGS__); \
  									} \
  								}
  
  #else
  
  #define git_trace_level()		((void)0)
  #define git_trace(lvl, ...)		((void)0)
  
  #endif
  
  #endif
  

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