133 lines
2 KiB
C
133 lines
2 KiB
C
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/*++
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Copyright (c) 1997 Microsoft Corporation
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Module Name:
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tracelog.h
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Abstract:
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This module contains public declarations and definitions for creating
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trace logs.
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A trace log is a fast, in-memory, thread safe activity log useful
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for debugging certain classes of problems. They are especially useful
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when debugging reference count bugs.
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Note that the creator of the log has the option of adding "extra"
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bytes to the log header. This can be useful if the creator wants to
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create a set of global logs, each on a linked list.
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Author:
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Keith Moore (keithmo) 30-Apr-1997
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Revision History:
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--*/
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#ifndef _TRACELOG_H_
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#define _TRACELOG_H_
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#if defined(__cplusplus)
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extern "C" {
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#endif // __cplusplus
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typedef struct _TRACE_LOG {
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//
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// Signature.
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//
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LONG Signature;
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//
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// The total number of entries available in the log.
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//
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LONG LogSize;
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//
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// The index of the next entry to use.
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//
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LONG NextEntry;
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//
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// The byte size of each entry.
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//
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LONG EntrySize;
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//
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// Pointer to the start of the circular buffer.
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//
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PUCHAR LogBuffer;
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//
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// The extra header bytes and actual log entries go here.
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//
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// BYTE ExtraHeaderBytes[ExtraBytesInHeader];
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// BYTE Entries[LogSize][EntrySize];
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//
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} TRACE_LOG, *PTRACE_LOG;
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//
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// Log header signature.
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//
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#define TRACE_LOG_SIGNATURE ((DWORD)'gOlT')
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#define TRACE_LOG_SIGNATURE_X ((DWORD)'golX')
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//
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// This macro maps a TRACE_LOG pointer to a pointer to the 'extra'
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// data associated with the log.
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//
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#define TRACE_LOG_TO_EXTRA_DATA(log) (PVOID)( (log) + 1 )
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//
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// Manipulators.
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//
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PTRACE_LOG
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CreateTraceLog(
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IN LONG LogSize,
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IN LONG ExtraBytesInHeader,
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IN LONG EntrySize
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);
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VOID
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DestroyTraceLog(
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IN PTRACE_LOG Log
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);
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LONG
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WriteTraceLog(
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IN PTRACE_LOG Log,
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IN PVOID Entry
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);
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VOID
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ResetTraceLog(
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IN PTRACE_LOG Log
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);
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#if defined(__cplusplus)
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} // extern "C"
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#endif // __cplusplus
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#endif // _TRACELOG_H_
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