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/*
* Copyright (c) 2009 Nicira Networks.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef COVERAGE_H
#define COVERAGE_H 1
/* This file implements a simple form of coverage instrumentation. Points in
* source code that are of interest must be explicitly annotated with
* COVERAGE_INC. The coverage counters may be logged at any time with
* coverage_log().
*
* This form of coverage instrumentation is intended to be so lightweight that
* it can be enabled in production builds. It is obviously not a substitute
* for traditional coverage instrumentation with e.g. "gcov", but it is still
* a useful debugging tool. */
#include "vlog.h"
/* A coverage counter. */
struct coverage_counter {
const char *name; /* Textual name. */
unsigned int count; /* Count within the current epoch. */
unsigned long long int total; /* Total count over all epochs. */
};
/* Increments the counter with the given NAME. Coverage counters need not be
* declared explicitly, but when you add the first coverage counter to a given
* file, you must also add that file to COVERAGE_FILES in lib/automake.mk. */
#define COVERAGE_INC(NAME) \
do { \
extern struct coverage_counter NAME##_count; \
NAME##_count.count++; \
} while (0)
/* Adds AMOUNT to the coverage counter with the given NAME. */
#define COVERAGE_ADD(NAME, AMOUNT) \
do { \
extern struct coverage_counter NAME##_count; \
NAME##_count.count += AMOUNT; \
} while (0)
void coverage_log(enum vlog_level);
void coverage_clear(void);
#endif /* coverage.h */
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