| 术语 | pdhparsecounterpath |
| 释义 | PdhParseCounterPath 语法： C++ PDH_STATUS PdhParseCounterPath( __in LPCTSTR szFullPathBuffer, __out PDH_COUNTER_PATH_ELEMENTS *pCounterPathElements, __inout LPDWORD pdwBufferSize, DWORD dwFlags ); PdhParseCounterPath功能 解析计数器的路径和存储元件的结果在PDH_COUNTER_PATH_ELEMENTS结构。 参数 szFullPathBuffer [in] null结尾的字符串，其中包含计数器路径解析。计数器的路径的最大长度为PDH_MAX_COUNTER_PATH。 pCounterPathElements [out] 来电分配的缓冲区，它接收PDH_COUNTER_PATH_ELEMENTS结构。该结构包含指向由szFullPathBuffer参数引用的路径个别字符串元素。函数的字符串附加到PDH_COUNTER_PATH_ELEMENTS结构的结束。分配的缓冲区必须足够大的结构和字符串。设置为NULL，如果pdwBufferSize是零。 pdwBufferSize [ in , out ] 的大小pCounterPathElements缓冲区，以字节为单位。如果零输入，该函数返回PDH_MORE_DATA，并设置此参数所需的缓冲区大小。如果缓冲区比所需的大小，功能设置此参数的时候，往往有人使用的缓冲区的实际大小。如果在输入指定的大小是大于零，但比所需的大小少，您不应该依靠返回的大小重新分配缓冲区。 dwFlags 保留。必须为零。 返回值 如果函数成功，它返回ERROR_SUCCESS。 如果函数失败，返回值是一个系统错误代码或一种PDH错误代码。以下是可能的值。 返回codeDescription PDH_INVALID_ARGUMENTA参数无效。 PDH_MORE_DATAThe pCounterPathElements缓冲区太小，无法包含路径元素。这个返回值，预计如果pdwBufferSize是在输入为零。如果在输入指定的大小是大于零，但比所需的大小少，您不应该依靠返回的大小重新分配缓冲区。 PDH_INVALID_PATHThe路径格式不正确，不能被解析。例如，在某些版本中您可以收到此错误如果在输入指定的大小是大于零但小于所需的大小。 PDH_MEMORY_ALLOCATION_FAILUREUnable分配内存才能完成的功能。 备注 您应该调用这个函数两次，第一次获得所需的缓冲区大小(设置pCounterPathElements为NULL和pdwBufferSize为0)，和第二次获取数据。 要求： 最低支持：client－Windows 2000专业版 最低支持server－Windows 2000服务器 HeaderPdh.h LibraryPdh.lib DLLPdh.dll Unicode和ANSI namesPdhParseCounterPathW(Unicode)和PdhParseCounterPathA(ANSI)的 参见 PDH_COUNTER_PATH_ELEMENTS PdhMakeCounterPath 如果有任何问题和意见，请发送给微软(wsddocfb@microsoft.com) 生成日期：2009年7月23日 ＝＝英文原文＝＝PdhParseCounterPath Function Parses the elements of the counter path and stores the results in the PDH_COUNTER_PATH_ELEMENTS structure. Syntax C++ PDH_STATUS PdhParseCounterPath( __in LPCTSTR szFullPathBuffer, __out PDH_COUNTER_PATH_ELEMENTS *pCounterPathElements, __inout LPDWORD pdwBufferSize, DWORD dwFlags ); Parameters szFullPathBuffer [in] Null-terminated string that contains the counter path to parse. The maximum length of a counter path is PDH_MAX_COUNTER_PATH. pCounterPathElements [out] Caller-allocated buffer that receives a PDH_COUNTER_PATH_ELEMENTS structure. The structure contains pointers to the individual string elements of the path referenced by the szFullPathBuffer parameter. The function appends the strings to the end of the PDH_COUNTER_PATH_ELEMENTS structure. The allocated buffer should be large enough for the structure and the strings. Set to NULL if pdwBufferSize is zero. pdwBufferSize [in, out] Size of the pCounterPathElements buffer, in bytes. If zero on input, the function returns PDH_MORE_DATA and sets this parameter to the required buffer size. If the buffer is larger than the required size, the function sets this parameter to the actual size of the buffer that was used. If the specified size on input is greater than zero but less than the required size, you should not rely on the returned size to reallocate the buffer. dwFlags Reserved. Must be zero. Return Value If the function succeeds, it returns ERROR_SUCCESS. If the function fails, the return value is a system error code or a PDH error code . The following are possible values. Return codeDescription PDH_INVALID_ARGUMENTA parameter is not valid. PDH_MORE_DATAThe pCounterPathElements buffer is too small to contain the path elements. This return value is expected if pdwBufferSize is zero on input. If the specified size on input is greater than zero but less than the required size, you should not rely on the returned size to reallocate the buffer. PDH_INVALID_PATHThe path is not formatted correctly and cannot be parsed. For example, on some releases you could receive this error if the specified size on input is greater than zero but less than the required size. PDH_MEMORY_ALLOCATION_FAILUREUnable to allocate memory in order to complete the function. Remarks You should call this function twice, the first time to get the required buffer size (set pCounterPathElements to NULL and pdwBufferSize to 0), and the second time to get the data. Requirements Minimum supported clientWindows 2000 Professional Minimum supported serverWindows 2000 Server HeaderPdh.h LibraryPdh.lib DLLPdh.dll Unicode and ANSI namesPdhParseCounterPathW (Unicode) and PdhParseCounterPathA (ANSI) See Also PDH_COUNTER_PATH_ELEMENTS PdhMakeCounterPath Send comments about this topic to Microsoft Build date: 7/23/2009 ＝＝原始网址＝＝http://msdn.microsoft.com/en-us/library/aa372657(VS.85).aspx\n |
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