/** @file * IPRT - Binary trace log API. */ /* * Copyright (C) 2018-2020 Oracle Corporation * * This file is part of VirtualBox Open Source Edition (OSE), as * available from http://www.virtualbox.org. This file is free software; * you can redistribute it and/or modify it under the terms of the GNU * General Public License (GPL) as published by the Free Software * Foundation, in version 2 as it comes in the "COPYING" file of the * VirtualBox OSE distribution. VirtualBox OSE is distributed in the * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. * * The contents of this file may alternatively be used under the terms * of the Common Development and Distribution License Version 1.0 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the * VirtualBox OSE distribution, in which case the provisions of the * CDDL are applicable instead of those of the GPL. * * You may elect to license modified versions of this file under the * terms and conditions of either the GPL or the CDDL or both. */ #ifndef IPRT_INCLUDED_tracelog_h #define IPRT_INCLUDED_tracelog_h #ifndef RT_WITHOUT_PRAGMA_ONCE # pragma once #endif #include #include RT_C_DECLS_BEGIN /** @defgroup grp_tracelog RTTraceLog - Binary trace log API * @ingroup grp_rt * @{ */ /** * Trace log item type. */ typedef enum RTTRACELOGTYPE { /** Invalid first value. */ RTTRACELOGTYPE_INVALID = 0, /** Boolean item type. */ RTTRACELOGTYPE_BOOL, /** Unsigned 8bit integer type. */ RTTRACELOGTYPE_UINT8, /** Signed 8bit integer type. */ RTTRACELOGTYPE_INT8, /** Unsigned 16bit integer type. */ RTTRACELOGTYPE_UINT16, /** Signed 16bit integer type. */ RTTRACELOGTYPE_INT16, /** Unsigned 32bit integer type. */ RTTRACELOGTYPE_UINT32, /** Signed 32bit integer type. */ RTTRACELOGTYPE_INT32, /** Unsigned 64bit integer type. */ RTTRACELOGTYPE_UINT64, /** Signed 64bit integer type. */ RTTRACELOGTYPE_INT64, /** 32bit floating point type. */ RTTRACELOGTYPE_FLOAT32, /** 64bit floating point type. */ RTTRACELOGTYPE_FLOAT64, /** Raw binary data type. */ RTTRACELOGTYPE_RAWDATA, /** Pointer data type. */ RTTRACELOGTYPE_POINTER, /** size_t data type. */ RTTRACELOGTYPE_SIZE, /** 32-bit hack. */ RTTRACELOGTYPE_32BIT_HACK = 0x7fffffff } RTTRACELOGTYPE; /** Pointer to a trace log item type. */ typedef RTTRACELOGTYPE *PRTTRACELOGTYPE; /** Pointer to a const trace log item type. */ typedef const RTTRACELOGTYPE *PCRTTRACELOGTYPE; /** * Trace log event severity. */ typedef enum RTTRACELOGEVTSEVERITY { /** Invalid severity. */ RTTRACELOGEVTSEVERITY_INVALID = 0, /** Informational event. */ RTTRACELOGEVTSEVERITY_INFO, /** Warning event. */ RTTRACELOGEVTSEVERITY_WARNING, /** Error event. */ RTTRACELOGEVTSEVERITY_ERROR, /** Fatal event. */ RTTRACELOGEVTSEVERITY_FATAL, /** Debug event. */ RTTRACELOGEVTSEVERITY_DEBUG, /** 32bit hack.*/ RTTRACELOGEVTSEVERITY_32BIT_HACK = 0x7fffffff } RTTRACELOGEVTSEVERITY; /** Pointer to a event severity class. */ typedef RTTRACELOGEVTSEVERITY *PRTTRACELOGEVTSEVERITY; /** Pointer to a const event severiy class. */ typedef RTTRACELOGEVTSEVERITY *PCRTTRACELOGEVTSEVERITY; /** * Trace log reader event. */ typedef enum RTTRACELOGRDRPOLLEVT { /** Invalid event. */ RTTRACELOGRDRPOLLEVT_INVALID = 0, /** The header was received and valid. */ RTTRACELOGRDRPOLLEVT_HDR_RECVD, /** Event data was fetched. */ RTTRACELOGRDRPOLLEVT_TRACE_EVENT_RECVD, /** 32bit hack. */ RTTRACELOGRDRPOLLEVT_32BIT_HACK = 0x7fffffff } RTTRACELOGRDRPOLLEVT; /** Pointer to a trace log reader event. */ typedef RTTRACELOGRDRPOLLEVT *PRTTRACELOGRDRPOLLEVT; /** * Trace log event item descriptor. */ typedef struct RTTRACELOGEVTITEMDESC { /** Event item name. */ const char *pszName; /** Event item description. */ const char *pszDesc; /** Event item type. */ RTTRACELOGTYPE enmType; /** The size of the raw data if static for the item, * 0 otherwise (and given when the event is logged). * Only valid for the RTTRACELOGTYPE_RAWDATA type, * ignored otherwise. */ size_t cbRawData; } RTTRACELOGEVTITEMDESC; /** Pointer to an trace log event item descriptor. */ typedef RTTRACELOGEVTITEMDESC *PRTTRACELOGEVTITEMDESC; /** Pointer to a const trace log event item descriptor. */ typedef const RTTRACELOGEVTITEMDESC *PCRTTRACELOGEVTITEMDESC; /** Pointer to a trace log event item descriptor pointer. */ typedef PRTTRACELOGEVTITEMDESC *PPRTTRACELOGEVTITEMDESC; /** Pointer to a const trace log event item descriptor pointer. */ typedef PCRTTRACELOGEVTITEMDESC *PPCRTTRACELOGEVTITEMDESC; /** * Trace log event descriptor. */ typedef struct RTTRACELOGEVTDESC { /** Event identifier. */ const char *pszId; /** Event description. */ const char *pszDesc; /** Severity class of the event. */ RTTRACELOGEVTSEVERITY enmSeverity; /** Number of items recorded for an event. */ uint32_t cEvtItems; /** Pointer to array of event item descriptors. */ PCRTTRACELOGEVTITEMDESC paEvtItemDesc; } RTTRACELOGEVTDESC; /** Pointer to a trace log event descriptor. */ typedef RTTRACELOGEVTDESC *PRTTRACELOGEVTDESC; /** Pointer to a const trace log event descriptor. */ typedef const RTTRACELOGEVTDESC *PCRTTRACELOGEVTDESC; /** * Trace log event item value. */ typedef struct RTTRACELOGEVTVAL { /** Pointer to the corresponding event item descriptor. */ PCRTTRACELOGEVTITEMDESC pItemDesc; /** Value union. */ union { bool f; uint8_t u8; int8_t i8; uint16_t u16; int16_t i16; uint32_t u32; int32_t i32; uint64_t u64; int64_t i64; uint64_t sz; uint64_t uPtr; float f32; double f64; struct { size_t cb; const uint8_t *pb; } RawData; } u; } RTTRACELOGEVTVAL; /** Pointer to trace log event item value. */ typedef RTTRACELOGEVTVAL *PRTTRACELOGEVTVAL; /** Pointer to a const trace log event item value. */ typedef const RTTRACELOGEVTVAL *PCRTTRACELOGEVTVAL; /** * Item mapping descriptor. */ typedef struct RTTRACELOGRDRMAPITEM { /** The item name. */ const char *pszName; /** The value type to map the item to. */ RTTRACELOGTYPE enmType; } RTTRACELOGRDRMAPITEM; /** Pointer to a mapping item descriptor. */ typedef RTTRACELOGRDRMAPITEM *PRTTRACELOGRDRMAPITEM; /** Pointer to a const mapping item descriptor. */ typedef const RTTRACELOGRDRMAPITEM *PCRTTRACELOGRDRMAPITEM; /** * Event item to value mapping descriptor for RTTraceLogRdrEvtMapToStruct(). */ typedef struct RTTRACELOGRDRMAPDESC { /** The event ID this mapping describes. */ const char *pszEvtId; /** Number of event items to extract. */ uint32_t cEvtItems; /** Pointer to the event items to extract (in the given order). */ PCRTTRACELOGRDRMAPITEM paMapItems; } RTTRACELOGRDRMAPDESC; /** Pointer to a event mapping descriptor. */ typedef RTTRACELOGRDRMAPDESC *PRTTRACELOGRDRMAPDESC; /** Pointer to a const event mapping descriptor. */ typedef const RTTRACELOGRDRMAPDESC *PCRTTRACELOGRDRMAPDESC; /** * Header for an event mapped to a binary. */ typedef struct RTTRACELOGRDREVTHDR { /** The mapping descriptor this event was mapped to. */ PCRTTRACELOGRDRMAPDESC pEvtMapDesc; /** The event descriptor as extracted from the event log. */ PCRTTRACELOGEVTDESC pEvtDesc; /** Sequence number of the descriptor. */ uint64_t idSeqNo; /** The timestamp of the event. */ uint64_t tsEvt; /** Pointer to the event data items. */ PCRTTRACELOGEVTVAL paEvtItems; } RTTRACELOGRDREVTHDR; /** Pointer to an event header. */ typedef RTTRACELOGRDREVTHDR *PRTTRACELOGRDREVTHDR; /** Pointer to a const event header. */ typedef const RTTRACELOGRDREVTHDR *PCRTTRACELOGRDREVTHDR; /** Event group ID. */ typedef uint64_t RTTRACELOGEVTGRPID; /** Pointer to the event group ID. */ typedef RTTRACELOGEVTGRPID *PRTTRACELOGEVTGRPID; /** Trace log event handle. */ typedef uint64_t RTRACELOGEVT; /** Pointer to a trace log event handle. */ typedef RTRACELOGEVT *PRTRACELOGEVT; /** Trace log writer handle. */ typedef struct RTTRACELOGWRINT *RTTRACELOGWR; /** Pointer to a trace log writer handle. */ typedef RTTRACELOGWR *PRTTRACELOGWR; /** NIL trace log writer handle value. */ #define NIL_RTTRACELOGWR ((RTTRACELOGWR)0) /** Trace log reader handle. */ typedef struct RTTRACELOGRDRINT *RTTRACELOGRDR; /** Pointer to a trace log reader handle. */ typedef RTTRACELOGRDR *PRTTRACELOGRDR; /** NIL trace log reader handle value. */ #define NIL_RTTRACELOGRDR ((RTTRACELOGRDR)0) /** Trace log reader iterator handle. */ typedef struct RTTRACELOGRDRITINT *RTTRACELOGRDRIT; /** Pointer to a trace log reader iterator handle. */ typedef RTTRACELOGRDRIT *PRTTRACELOGRDRIT; /** NIL trace log reader iterator handle. */ #define NIL_RTTRACELOGRDRIT ((RTTRACELOGRDRIT)0) /** Trace log reader event handle. */ typedef struct RTTRACELOGRDREVTINT *RTTRACELOGRDREVT; /** Pointer to a trace log reader event handle. */ typedef RTTRACELOGRDREVT *PRTTRACELOGRDREVT; /** NIL trace log reader event handle. */ #define NIL_RTTRACELOGRDREVT ((RTTRACELOGRDREVT)0) /** A new grouped event is started. */ #define RTTRACELOG_WR_ADD_EVT_F_GRP_START RT_BIT_32(0) /** A grouped event is finished. */ #define RTTRACELOG_WR_ADD_EVT_F_GRP_FINISH RT_BIT_32(1) /** * Callback to stream out data from the trace log writer. * * @returns IPRT status code. * @param pvUser Opaque user data passed on trace log writer creation. * @param pvBuf Pointer to the buffer to stream out. * @param cbBuf Number of bytes to stream. * @param pcbWritten Where to store the number of bytes written on success, optional. */ typedef DECLCALLBACKTYPE(int, FNRTTRACELOGWRSTREAM,(void *pvUser, const void *pvBuf, size_t cbBuf, size_t *pcbWritten)); /** Pointer to a writer stream callback. */ typedef FNRTTRACELOGWRSTREAM *PFNRTTRACELOGWRSTREAM; /** * Callback to stream int data to the trace log reader. * * @returns IPRT status code. * @retval VERR_EOF if the stream reached the end. * @retval VERR_INTERRUPTED if waiting for something to arrive was interrupted. * @retval VERR_TIMEOUT if the timeout was reached. * @param pvUser Opaque user data passed on trace log reader creation. * @param pvBuf Where to store the read data. * @param cbBuf Number of bytes the buffer can hold. * @param pcbRead Where to store the number of bytes read on success. * @param cMsTimeout How long to wait for something to arrive */ typedef DECLCALLBACKTYPE(int, FNRTTRACELOGRDRSTREAM,(void *pvUser, void *pvBuf, size_t cbBuf, size_t *pcbRead, RTMSINTERVAL cMsTimeout)); /** Pointer to a writer stream callback. */ typedef FNRTTRACELOGRDRSTREAM *PFNRTTRACELOGRDRSTREAM; /** * Callback to close the stream. * * @returns IPRT status code. * @param pvUser Opaque user data passed on trace log writer creation. */ typedef DECLCALLBACKTYPE(int, FNRTTRACELOGSTREAMCLOSE,(void *pvUser)); /** Pointer to a stream close callback. */ typedef FNRTTRACELOGSTREAMCLOSE *PFNRTTRACELOGSTREAMCLOSE; /** * Creates a new trace log writer. * * @returns IPRT status code. * @param phTraceLogWr Where to store the handle to the trace log writer on success. * @param pszDesc Optional description to store in the header. * @param pfnStreamOut The callback to use for streaming the trace log data. * @param pfnStreamClose The callback to use for closing the stream. * @param pvUser Opaque user data to pass to the streaming callback. */ RTDECL(int) RTTraceLogWrCreate(PRTTRACELOGWR phTraceLogWr, const char *pszDesc, PFNRTTRACELOGWRSTREAM pfnStreamOut, PFNRTTRACELOGSTREAMCLOSE pfnStreamClose, void *pvUser); /** * Creates a new trace log writer streaming data to the given file. * * @returns IPRT status code. * @param phTraceLogWr Where to store the handle to the trace log writer on success. * @param pszDesc Optional description to store in the header. * @param pszFilename The filename to stream the data to. */ RTDECL(int) RTTraceLogWrCreateFile(PRTTRACELOGWR phTraceLogWr, const char *pszDesc, const char *pszFilename); /** * Creates a new TCP server style trace log writer waiting for the other end to connect to it. * * @returns IPRT status code. * @param phTraceLogWr Where to store the handle to the trace log writer on success. * @param pszDesc Optional description to store in the header. * @param pszListen The address to listen on, NULL to listen on all interfaces. * @param uPort The port to listen on. * * @note The writer will block here until a client has connected. */ RTDECL(int) RTTraceLogWrCreateTcpServer(PRTTRACELOGWR phTraceLogWr, const char *pszDesc, const char *pszListen, unsigned uPort); /** * Creates a new TCP client style trace log writer connecting to the other end. * * @returns IPRT status code. * @param phTraceLogWr Where to store the handle to the trace log writer on success. * @param pszDesc Optional description to store in the header. * @param pszAddress The address to connect to. * @param uPort The port to connect to. * * @note An error is returned if no connection can be established. */ RTDECL(int) RTTraceLogWrCreateTcpClient(PRTTRACELOGWR phTraceLogWr, const char *pszDesc, const char *pszAddress, unsigned uPort); /** * Destroys the given trace log writer instance. * * @returns IPRT status code. * @param hTraceLogWr The trace log writer instance handle. */ RTDECL(int) RTTraceLogWrDestroy(RTTRACELOGWR hTraceLogWr); /** * Adds a given event structure descriptor to the given trace log writer instance * (for prepopulation). * * @returns IPRT status code. * @param hTraceLogWr The trace log writer instance handle. * @param pEvtDesc The event structure descriptor to add. * * @note The event descriptor is keyed by the pointer for faster lookup in subsequent calls, * so don't free after this method finishes. */ RTDECL(int) RTTraceLogWrAddEvtDesc(RTTRACELOGWR hTraceLogWr, PCRTTRACELOGEVTDESC pEvtDesc); /** * Adds a new event to the trace log. * * @returns IPRT status code. * @param hTraceLogWr The trace log writer instance handle. * @param pEvtDesc The event descriptor to use for formatting. * @param fFlags Flags to use for this event.y * @param uGrpId A unique group ID for grouped events. * @param uParentGrpId A parent group ID this event originated from. * @param pvEvtData Pointer to the raw event data. * @param pacbRawData Pointer to the array of size indicators for non static raw data in the event data stream. * * @note The event descriptor is keyed by the pointer for faster lookup in subsequent calls, * so don't free after this method finishes. */ RTDECL(int) RTTraceLogWrEvtAdd(RTTRACELOGWR hTraceLogWr, PCRTTRACELOGEVTDESC pEvtDesc, uint32_t fFlags, RTTRACELOGEVTGRPID uGrpId, RTTRACELOGEVTGRPID uParentGrpId, const void *pvEvtData, size_t *pacbRawData); /** * Adds a new event to the trace log. * * @returns IPRT status code. * @param hTraceLogWr The trace log writer instance handle. * @param pEvtDesc The event descriptor used for formatting the data. * @param fFlags Flags to use for this event. * @param uGrpId A unique group ID for grouped events. * @param uParentGrpId A parent group ID this event originated from. * @param pSgBufEvtData S/G buffer holding the raw event data. * @param pacbRawData Pointer to the array of size indicators for non static raw data in the event data stream. * * @note The event descriptor is keyed by the pointer for faster lookup in subsequent calls, * so don't free after this method finishes. */ RTDECL(int) RTTraceLogWrEvtAddSg(RTTRACELOGWR hTraceLogWr, PCRTTRACELOGEVTDESC pEvtDesc, uint32_t fFlags, RTTRACELOGEVTGRPID uGrpId, RTTRACELOGEVTGRPID uParentGrpId, PRTSGBUF *pSgBufEvtData, size_t *pacbRawData); /** * Adds a new event to the trace log - list variant. * * @returns IPRT status code. * @param hTraceLogWr The trace log writer instance handle. * @param pEvtDesc The event descriptor used for formatting the data. * @param fFlags Flags to use for this event. * @param uGrpId A unique group ID for grouped events. * @param uParentGrpId A parent group ID this event originated from. * @param va The event data as single items as described by the descriptor. * * @note The event descriptor is keyed by the pointer for faster lookup in subsequent calls, * so don't free after this method finishes. */ RTDECL(int) RTTraceLogWrEvtAddLV(RTTRACELOGWR hTraceLogWr, PCRTTRACELOGEVTDESC pEvtDesc, uint32_t fFlags, RTTRACELOGEVTGRPID uGrpId, RTTRACELOGEVTGRPID uParentGrpId, va_list va); /** * Adds a new event to the trace log - list variant. * * @returns IPRT status code. * @param hTraceLogWr The trace log writer instance handle. * @param pEvtDesc The event descriptor used for formatting the data. * @param fFlags Flags to use for this event. * @param uGrpId A unique group ID for grouped events. * @param uParentGrpId A parent group ID this event originated from. * @param ... The event data as single items as described by the descriptor. * * @note The event descriptor is keyed by the pointer for faster lookup in subsequent calls, * so don't free after this method finishes. */ RTDECL(int) RTTraceLogWrEvtAddL(RTTRACELOGWR hTraceLogWr, PCRTTRACELOGEVTDESC pEvtDesc, uint32_t fFlags, RTTRACELOGEVTGRPID uGrpId, RTTRACELOGEVTGRPID uParentGrpId, ...); /** * Creates a new trace log reader instance. * * @returns IPRT status code. * @param phTraceLogRdr Where to store the handle to the trace log reader instance on success. * @param pfnStreamIn Callback to stream the data into the reader. * @param pfnStreamClose The callback to use for closing the stream. * @param pvUser Opaque user data passed to the stream callback. */ RTDECL(int) RTTraceLogRdrCreate(PRTTRACELOGRDR phTraceLogRdr, PFNRTTRACELOGRDRSTREAM pfnStreamIn, PFNRTTRACELOGSTREAMCLOSE pfnStreamClose, void *pvUser); /** * Creates a new trace log reader for the given file. * * @returns IPRT status code. * @param phTraceLogRdr Where to store the handle to the trace log reader instance on success. * @param pszFilename The file to read the trace log data from. */ RTDECL(int) RTTraceLogRdrCreateFromFile(PRTTRACELOGRDR phTraceLogRdr, const char *pszFilename); /** * Destroys the given trace log reader instance. * * @returns IPRT status code. * @param hTraceLogRdr The trace log reader instance handle. */ RTDECL(int) RTTraceLogRdrDestroy(RTTRACELOGRDR hTraceLogRdr); /** * Polls for an event on the trace log reader instance. * * @returns IPRT status code. * @retval VERR_TIMEOUT if the timeout was reached. * @retval VERR_INTERRUPTED if the poll was interrupted. * @param hTraceLogRdr The trace log reader instance handle. * @param penmEvt Where to store the event identifier. * @param cMsTimeout How long to poll for an event. */ RTDECL(int) RTTraceLogRdrEvtPoll(RTTRACELOGRDR hTraceLogRdr, RTTRACELOGRDRPOLLEVT *penmEvt, RTMSINTERVAL cMsTimeout); /** * Queries the last received event from the trace log read instance. * * @returns IPRT status code. * @retval VERR_NOT_FOUND if no event was received so far. * @param hTraceLogRdr The trace log reader instance handle. * @param phRdrEvt Where to store the event handle on success. */ RTDECL(int) RTTraceLogRdrQueryLastEvt(RTTRACELOGRDR hTraceLogRdr, PRTTRACELOGRDREVT phRdrEvt); /** * Queries a new iterator for walking received events. * * @returns IPRT status code * @param hTraceLogRdr The trace log reader instance handle. * @param phIt Where to store the handle to iterator on success. */ RTDECL(int) RTTraceLogRdrQueryIterator(RTTRACELOGRDR hTraceLogRdr, PRTTRACELOGRDRIT phIt); /** * Extracts the given number of events from the given trace log reader instance returning * and array of events with the values filled in from the mapping descriptor. * * @returns IPRT status code. * @param hTraceLogRdr The trace log reader instance handle. * @param fFlags Flags controlling the behavior, MBZ. * @param cEvts Number of events to extract, UINT32_MAX to map all immediately available events. * @param paMapDesc Pointer to an array of mapping descriptors describing how to map events. * @param ppaEvtHdr Where to return the pointer to the allocated array of event headers on success. * @param pcEvts Where to store the returned number of events on success. */ RTDECL(int) RTTraceLogRdrEvtMapToStruct(RTTRACELOGRDR hTraceLogRdr, uint32_t fFlags, uint32_t cEvts, PCRTTRACELOGRDRMAPDESC paMapDesc, PCRTTRACELOGRDREVTHDR *ppaEvtHdr, uint32_t *pcEvts); /** * Frees all resources of the given array of event headers as allocated by RTTraceLogRdrEvtMapToStruct(). * * @returns nothing. * @param paEvtHdr Pointer to the array of events as returned by RTTraceLogRdrEvtMapToStruct(). * @param cEvts Number of events as returned by RTTraceLogRdrEvtMapToStruct(). */ RTDECL(void) RTTraceLogRdrEvtMapFree(PCRTTRACELOGRDREVTHDR paEvtHdr, uint32_t cEvts); /** * Frees a previously created iterator. * * @returns nothing. * @param hIt The iterator handle to free. */ RTDECL(void) RTTraceLogRdrIteratorFree(RTTRACELOGRDRIT hIt); /** * Advances to the next event. * * @returns IPRT status code * @retval VERR_TRACELOG_READER_ITERATOR_END if the iterator reached the end. * @param hIt The iterator handle. */ RTDECL(int) RTTraceLogRdrIteratorNext(RTTRACELOGRDRIT hIt); /** * Queries the event at the current iterator position. * * @returns IPRT status code. * @param hIt The iterator handle. * @param phRdrEvt Where to store the event handle on success. */ RTDECL(int) RTTraceLogRdrIteratorQueryEvent(RTTRACELOGRDRIT hIt, PRTTRACELOGRDREVT phRdrEvt); /** * Returns the sequence number of the given event. * * @returns Sequence number of the given event. * @param hRdrEvt The reader event handle. */ RTDECL(uint64_t) RTTraceLogRdrEvtGetSeqNo(RTTRACELOGRDREVT hRdrEvt); /** * Gets the timestamp of the given event. * * @returns Timestamp of the given event. * @param hRdrEvt The reader event handle. */ RTDECL(uint64_t) RTTraceLogRdrEvtGetTs(RTTRACELOGRDREVT hRdrEvt); /** * Returns whether the given event is part of an event group. * * @returns Flag whether the event is part of a group. * @param hRdrEvt The reader event handle. */ RTDECL(bool) RTTraceLogRdrEvtIsGrouped(RTTRACELOGRDREVT hRdrEvt); /** * Returns the event descriptor associated with the given event. * * @returns The trace log event descriptor associated with this event. * @param hRdrEvt The reader event handle. */ RTDECL(PCRTTRACELOGEVTDESC) RTTraceLogRdrEvtGetDesc(RTTRACELOGRDREVT hRdrEvt); /** * Queries an event item by its name returning the value in the supplied buffer. * * @returns IPRT status code. * @retval VERR_NOT_FOUND if the item name was not found for the given event. * @param hRdrEvt The reader event handle. * @param pszName The item name to query. * @param pVal The item value buffer to initialise. */ RTDECL(int) RTTraceLogRdrEvtQueryVal(RTTRACELOGRDREVT hRdrEvt, const char *pszName, PRTTRACELOGEVTVAL pVal); /** * Fills the given value array using the values from the given event. * * @returns IPRT status code * @param hRdrEvt The reader event handle. * @param idxItemStart The index of the item to start filling the value in. * @param paVals Array of values to fill. * @param cVals Number of values the array is able to hold. * @param pcVals Where to store the number of values filled on success. */ RTDECL(int) RTTraceLogRdrEvtFillVals(RTTRACELOGRDREVT hRdrEvt, unsigned idxItemStart, PRTTRACELOGEVTVAL paVals, unsigned cVals, unsigned *pcVals); RT_C_DECLS_END /** @} */ #endif /* !IPRT_INCLUDED_tracelog_h */