Annotation of embedaddon/mpd/src/contrib/libpdel/debug/debug.h, revision 1.1
1.1 ! misho 1:
! 2: /*
! 3: * Copyright (c) 2001-2002 Packet Design, LLC.
! 4: * All rights reserved.
! 5: *
! 6: * Subject to the following obligations and disclaimer of warranty,
! 7: * use and redistribution of this software, in source or object code
! 8: * forms, with or without modifications are expressly permitted by
! 9: * Packet Design; provided, however, that:
! 10: *
! 11: * (i) Any and all reproductions of the source or object code
! 12: * must include the copyright notice above and the following
! 13: * disclaimer of warranties; and
! 14: * (ii) No rights are granted, in any manner or form, to use
! 15: * Packet Design trademarks, including the mark "PACKET DESIGN"
! 16: * on advertising, endorsements, or otherwise except as such
! 17: * appears in the above copyright notice or in the software.
! 18: *
! 19: * THIS SOFTWARE IS BEING PROVIDED BY PACKET DESIGN "AS IS", AND
! 20: * TO THE MAXIMUM EXTENT PERMITTED BY LAW, PACKET DESIGN MAKES NO
! 21: * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING
! 22: * THIS SOFTWARE, INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED
! 23: * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE,
! 24: * OR NON-INFRINGEMENT. PACKET DESIGN DOES NOT WARRANT, GUARANTEE,
! 25: * OR MAKE ANY REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS
! 26: * OF THE USE OF THIS SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY,
! 27: * RELIABILITY OR OTHERWISE. IN NO EVENT SHALL PACKET DESIGN BE
! 28: * LIABLE FOR ANY DAMAGES RESULTING FROM OR ARISING OUT OF ANY USE
! 29: * OF THIS SOFTWARE, INCLUDING WITHOUT LIMITATION, ANY DIRECT,
! 30: * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, PUNITIVE, OR CONSEQUENTIAL
! 31: * DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, LOSS OF
! 32: * USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY THEORY OF
! 33: * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
! 34: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
! 35: * THE USE OF THIS SOFTWARE, EVEN IF PACKET DESIGN IS ADVISED OF
! 36: * THE POSSIBILITY OF SUCH DAMAGE.
! 37: *
! 38: * Author: Archie Cobbs <archie@freebsd.org>
! 39: */
! 40:
! 41: #ifndef _PDEL_PDEL_DEBUG_H_
! 42: #define _PDEL_PDEL_DEBUG_H_
! 43:
! 44: /*
! 45: * This flag globally enables/disables debugging.
! 46: */
! 47: #define PDEL_DEBUG 0
! 48:
! 49: #if PDEL_DEBUG
! 50: /*
! 51: * Flags that enable various debugging options.
! 52: */
! 53: enum {
! 54: PDEL_DEBUG_HTTP,
! 55: PDEL_DEBUG_HTTP_HDRS,
! 56: PDEL_DEBUG_HTTP_CONNECTION_CACHE,
! 57: PDEL_DEBUG_HTTP_SERVLET_COOKIEAUTH,
! 58: PDEL_DEBUG_PEVENT,
! 59: PDEL_DEBUG_MUTEX,
! 60: };
! 61:
! 62: /*
! 63: * Runtime variable which controls debugging.
! 64: */
! 65: #define PDEL_DEBUG_FLAGS (0 \
! 66: | (1 << PDEL_DEBUG_HTTP) \
! 67: | (1 << PDEL_DEBUG_PEVENT) \
! 68: | (1 << PDEL_DEBUG_MUTEX) \
! 69: | 0)
! 70:
! 71: #endif /* PDEL_DEBUG */
! 72:
! 73: /*
! 74: * Macro to test whether a specific debug flag is enabled.
! 75: */
! 76: #if PDEL_DEBUG
! 77: #define PDEL_DEBUG_ENABLED(f) \
! 78: ((PDEL_DEBUG_FLAGS & (1 << PDEL_DEBUG_ ## f)) != 0)
! 79: #else
! 80: #define PDEL_DEBUG_ENABLED(f) (0)
! 81: #endif
! 82:
! 83: /*
! 84: * Macro for printing some debugging output.
! 85: */
! 86: #if PDEL_DEBUG
! 87: #define DBG(c, fmt, args...) \
! 88: do { \
! 89: char buf[240]; \
! 90: const char *s; \
! 91: int r, n; \
! 92: \
! 93: if (PDEL_DEBUG_ENABLED(c)) { \
! 94: snprintf(buf, sizeof(buf), \
! 95: "%p[%s]: " fmt "\n", pthread_self(), \
! 96: __FUNCTION__ , ## args); \
! 97: for (r = strlen(buf), s = buf; \
! 98: r > 0; r -= n, s += n) { \
! 99: if ((n = write(1, s, r)) == -1) \
! 100: break; \
! 101: } \
! 102: } \
! 103: } while (0)
! 104: #else
! 105: #define DBG(c, fmt, args...) do { } while (0)
! 106: #endif /* !PDEL_DEBUG */
! 107:
! 108: /*
! 109: * Mutex macros with additional debugging.
! 110: */
! 111: #if PDEL_DEBUG
! 112:
! 113: #define MUTEX_LOCK(m, c) \
! 114: do { \
! 115: int _r; \
! 116: \
! 117: DBG(MUTEX, "locking %s", #m); \
! 118: _r = pthread_mutex_lock(m); \
! 119: assert(_r == 0); \
! 120: (c)++; \
! 121: DBG(MUTEX, "%s locked -> %d", #m, (c)); \
! 122: } while (0)
! 123:
! 124: #define MUTEX_UNLOCK(m, c) \
! 125: do { \
! 126: int _r; \
! 127: \
! 128: (c)--; \
! 129: DBG(MUTEX, "unlocking %s -> %d", #m, (c)); \
! 130: _r = pthread_mutex_unlock(m); \
! 131: assert(_r == 0); \
! 132: DBG(MUTEX, "%s unlocked", #m); \
! 133: } while (0)
! 134:
! 135: #define MUTEX_TRYLOCK(m, c) \
! 136: do { \
! 137: int _r; \
! 138: \
! 139: DBG(MUTEX, "try locking %s", #m); \
! 140: _r = pthread_mutex_trylock(m); \
! 141: if (_r == 0) { \
! 142: (c)++; \
! 143: DBG(MUTEX, "%s locked -> %d", #m, (c)); \
! 144: } else \
! 145: DBG(MUTEX, "%s lock failed", #m); \
! 146: errno = _r; \
! 147: } while (0)
! 148:
! 149: #else /* !PDEL_DEBUG */
! 150:
! 151: #define MUTEX_LOCK(m, c) (void)pthread_mutex_lock(m)
! 152: #define MUTEX_UNLOCK(m, c) (void)pthread_mutex_unlock(m)
! 153: #define MUTEX_TRYLOCK(m, c) (errno = pthread_mutex_trylock(m))
! 154:
! 155: #endif /* !PDEL_DEBUG */
! 156:
! 157: #endif /* _PDEL_PDEL_DEBUG_H_ */
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