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/* * DO NOT EDIT. THIS FILE IS GENERATED FROM nsIPipe.idl */ #ifndef __gen_nsIPipe_h__ #define __gen_nsIPipe_h__ #ifndef __gen_nsIAsyncInputStream_h__ #include "nsIAsyncInputStream.h" #endif #ifndef __gen_nsIAsyncOutputStream_h__ #include "nsIAsyncOutputStream.h" #endif /* For IDL files that don't want to include root IDL files. */ #ifndef NS_NO_VTABLE #define NS_NO_VTABLE #endif class nsIMemory; /* forward declaration */ /* starting interface: nsIPipe */ #define NS_IPIPE_IID_STR "f4211abc-61b3-11d4-9877-00c04fa0cf4a" #define NS_IPIPE_IID \ {0xf4211abc, 0x61b3, 0x11d4, \ { 0x98, 0x77, 0x00, 0xc0, 0x4f, 0xa0, 0xcf, 0x4a }} /** * nsIPipe represents an in-process buffer that can be read using nsIInputStream * and written using nsIOutputStream. The reader and writer of a pipe do not * have to be on the same thread. As a result, the pipe is an ideal mechanism * to bridge data exchange between two threads. For example, a worker thread * might write data to a pipe from which the main thread will read. * * Each end of the pipe can be either blocking or non-blocking. Recall that a * non-blocking stream will return NS_BASE_STREAM_WOULD_BLOCK if it cannot be * read or written to without blocking the calling thread. For example, if you * try to read from an empty pipe that has not yet been closed, then if that * pipe's input end is non-blocking, then the read call will fail immediately * with NS_BASE_STREAM_WOULD_BLOCK as the error condition. However, if that * pipe's input end is blocking, then the read call will not return until the * pipe has data or until the pipe is closed. This example presumes that the * pipe is being filled asynchronously on some background thread. * * The pipe supports nsIAsyncInputStream and nsIAsyncOutputStream, which give * the user of a non-blocking pipe the ability to wait for the pipe to become * ready again. For example, in the case of an empty non-blocking pipe, the * user can call AsyncWait on the input end of the pipe to be notified when * the pipe has data to read (or when the pipe becomes closed). * * NS_NewPipe2 and NS_NewPipe provide convenient pipe constructors. In most * cases nsIPipe is not actually used. It is usually enough to just get * references to the pipe's input and output end. In which case, the pipe is * automatically closed when the respective pipe ends are released. */ class NS_NO_VTABLE nsIPipe : public nsISupports { public: NS_DEFINE_STATIC_IID_ACCESSOR(NS_IPIPE_IID) /** * initialize this pipe */ /* void init (in boolean nonBlockingInput, in boolean nonBlockingOutput, in unsigned long segmentSize, in unsigned long segmentCount, in nsIMemory segmentAllocator); */ NS_IMETHOD Init(PRBool nonBlockingInput, PRBool nonBlockingOutput, PRUint32 segmentSize, PRUint32 segmentCount, nsIMemory *segmentAllocator) = 0; /** * The pipe's input end, which also implements nsISearchableInputStream. */ /* readonly attribute nsIAsyncInputStream inputStream; */ NS_IMETHOD GetInputStream(nsIAsyncInputStream * *aInputStream) = 0; /** * The pipe's output end. */ /* readonly attribute nsIAsyncOutputStream outputStream; */ NS_IMETHOD GetOutputStream(nsIAsyncOutputStream * *aOutputStream) = 0; }; /* Use this macro when declaring classes that implement this interface. */ #define NS_DECL_NSIPIPE \ NS_IMETHOD Init(PRBool nonBlockingInput, PRBool nonBlockingOutput, PRUint32 segmentSize, PRUint32 segmentCount, nsIMemory *segmentAllocator); \ NS_IMETHOD GetInputStream(nsIAsyncInputStream * *aInputStream); \ NS_IMETHOD GetOutputStream(nsIAsyncOutputStream * *aOutputStream); /* Use this macro to declare functions that forward the behavior of this interface to another object. */ #define NS_FORWARD_NSIPIPE(_to) \ NS_IMETHOD Init(PRBool nonBlockingInput, PRBool nonBlockingOutput, PRUint32 segmentSize, PRUint32 segmentCount, nsIMemory *segmentAllocator) { return _to Init(nonBlockingInput, nonBlockingOutput, segmentSize, segmentCount, segmentAllocator); } \ NS_IMETHOD GetInputStream(nsIAsyncInputStream * *aInputStream) { return _to GetInputStream(aInputStream); } \ NS_IMETHOD GetOutputStream(nsIAsyncOutputStream * *aOutputStream) { return _to GetOutputStream(aOutputStream); } /* Use this macro to declare functions that forward the behavior of this interface to another object in a safe way. */ #define NS_FORWARD_SAFE_NSIPIPE(_to) \ NS_IMETHOD Init(PRBool nonBlockingInput, PRBool nonBlockingOutput, PRUint32 segmentSize, PRUint32 segmentCount, nsIMemory *segmentAllocator) { return !_to ? NS_ERROR_NULL_POINTER : _to->Init(nonBlockingInput, nonBlockingOutput, segmentSize, segmentCount, segmentAllocator); } \ NS_IMETHOD GetInputStream(nsIAsyncInputStream * *aInputStream) { return !_to ? NS_ERROR_NULL_POINTER : _to->GetInputStream(aInputStream); } \ NS_IMETHOD GetOutputStream(nsIAsyncOutputStream * *aOutputStream) { return !_to ? NS_ERROR_NULL_POINTER : _to->GetOutputStream(aOutputStream); } #if 0 /* Use the code below as a template for the implementation class for this interface. */ /* Header file */ class nsPipe : public nsIPipe { public: NS_DECL_ISUPPORTS NS_DECL_NSIPIPE nsPipe(); private: ~nsPipe(); protected: /* additional members */ }; /* Implementation file */ NS_IMPL_ISUPPORTS1(nsPipe, nsIPipe) nsPipe::nsPipe() { /* member initializers and constructor code */ } nsPipe::~nsPipe() { /* destructor code */ } /* void init (in boolean nonBlockingInput, in boolean nonBlockingOutput, in unsigned long segmentSize, in unsigned long segmentCount, in nsIMemory segmentAllocator); */ NS_IMETHODIMP nsPipe::Init(PRBool nonBlockingInput, PRBool nonBlockingOutput, PRUint32 segmentSize, PRUint32 segmentCount, nsIMemory *segmentAllocator) { return NS_ERROR_NOT_IMPLEMENTED; } /* readonly attribute nsIAsyncInputStream inputStream; */ NS_IMETHODIMP nsPipe::GetInputStream(nsIAsyncInputStream * *aInputStream) { return NS_ERROR_NOT_IMPLEMENTED; } /* readonly attribute nsIAsyncOutputStream outputStream; */ NS_IMETHODIMP nsPipe::GetOutputStream(nsIAsyncOutputStream * *aOutputStream) { return NS_ERROR_NOT_IMPLEMENTED; } /* End of implementation class template. */ #endif /* starting interface: nsISearchableInputStream */ #define NS_ISEARCHABLEINPUTSTREAM_IID_STR "8c39ef62-f7c9-11d4-98f5-001083010e9b" #define NS_ISEARCHABLEINPUTSTREAM_IID \ {0x8c39ef62, 0xf7c9, 0x11d4, \ { 0x98, 0xf5, 0x00, 0x10, 0x83, 0x01, 0x0e, 0x9b }} /** * XXX this interface doesn't really belong in here. It is here because * currently nsPipeInputStream is the only implementation of this interface. */ class NS_NO_VTABLE nsISearchableInputStream : public nsISupports { public: NS_DEFINE_STATIC_IID_ACCESSOR(NS_ISEARCHABLEINPUTSTREAM_IID) /** * Searches for a string in the input stream. Since the stream has a notion * of EOF, it is possible that the string may at some time be in the * buffer, but is is not currently found up to some offset. Consequently, * both the found and not found cases return an offset: * if found, return offset where it was found * if not found, return offset of the first byte not searched * In the case the stream is at EOF and the string is not found, the first * byte not searched will correspond to the length of the buffer. */ /* void search (in string forString, in boolean ignoreCase, out boolean found, out unsigned long offsetSearchedTo); */ NS_IMETHOD Search(const char *forString, PRBool ignoreCase, PRBool *found, PRUint32 *offsetSearchedTo) = 0; }; /* Use this macro when declaring classes that implement this interface. */ #define NS_DECL_NSISEARCHABLEINPUTSTREAM \ NS_IMETHOD Search(const char *forString, PRBool ignoreCase, PRBool *found, PRUint32 *offsetSearchedTo); /* Use this macro to declare functions that forward the behavior of this interface to another object. */ #define NS_FORWARD_NSISEARCHABLEINPUTSTREAM(_to) \ NS_IMETHOD Search(const char *forString, PRBool ignoreCase, PRBool *found, PRUint32 *offsetSearchedTo) { return _to Search(forString, ignoreCase, found, offsetSearchedTo); } /* Use this macro to declare functions that forward the behavior of this interface to another object in a safe way. */ #define NS_FORWARD_SAFE_NSISEARCHABLEINPUTSTREAM(_to) \ NS_IMETHOD Search(const char *forString, PRBool ignoreCase, PRBool *found, PRUint32 *offsetSearchedTo) { return !_to ? NS_ERROR_NULL_POINTER : _to->Search(forString, ignoreCase, found, offsetSearchedTo); } #if 0 /* Use the code below as a template for the implementation class for this interface. */ /* Header file */ class nsSearchableInputStream : public nsISearchableInputStream { public: NS_DECL_ISUPPORTS NS_DECL_NSISEARCHABLEINPUTSTREAM nsSearchableInputStream(); private: ~nsSearchableInputStream(); protected: /* additional members */ }; /* Implementation file */ NS_IMPL_ISUPPORTS1(nsSearchableInputStream, nsISearchableInputStream) nsSearchableInputStream::nsSearchableInputStream() { /* member initializers and constructor code */ } nsSearchableInputStream::~nsSearchableInputStream() { /* destructor code */ } /* void search (in string forString, in boolean ignoreCase, out boolean found, out unsigned long offsetSearchedTo); */ NS_IMETHODIMP nsSearchableInputStream::Search(const char *forString, PRBool ignoreCase, PRBool *found, PRUint32 *offsetSearchedTo) { return NS_ERROR_NOT_IMPLEMENTED; } /* End of implementation class template. */ #endif /** * NS_NewPipe2 * * This function supercedes NS_NewPipe. It differs from NS_NewPipe in two * major ways: * (1) returns nsIAsyncInputStream and nsIAsyncOutputStream, so it is * not necessary to QI in order to access these interfaces. * (2) the size of the pipe is determined by the number of segments * times the size of each segment. * * @param pipeIn * resulting input end of the pipe * @param pipeOut * resulting output end of the pipe * @param nonBlockingInput * true specifies non-blocking input stream behavior * @param nonBlockingOutput * true specifies non-blocking output stream behavior * @param segmentSize * specifies the segment size in bytes (pass 0 to use default value) * @param segmentCount * specifies the max number of segments (pass 0 to use default value) * passing PR_UINT32_MAX here causes the pipe to have "infinite" space. * this mode can be useful in some cases, but should always be used with * caution. the default value for this parameter is a finite value. * @param segmentAlloc * pass reference to nsIMemory to have all pipe allocations use this * allocator (pass null to use the default allocator) */ extern NS_COM nsresult NS_NewPipe2(nsIAsyncInputStream **pipeIn, nsIAsyncOutputStream **pipeOut, PRBool nonBlockingInput = PR_FALSE, PRBool nonBlockingOutput = PR_FALSE, PRUint32 segmentSize = 0, PRUint32 segmentCount = 0, nsIMemory *segmentAlloc = nsnull); /** * NS_NewPipe * * Preserved for backwards compatibility. Plus, this interface is more * amiable in certain contexts (e.g., when you don't need the pipe's async * capabilities). * * @param pipeIn * resulting input end of the pipe * @param pipeOut * resulting output end of the pipe * @param segmentSize * specifies the segment size in bytes (pass 0 to use default value) * @param maxSize * specifies the max size of the pipe (pass 0 to use default value) * number of segments is maxSize / segmentSize, and maxSize must be a * multiple of segmentSize. passing PR_UINT32_MAX here causes the * pipe to have "infinite" space. this mode can be useful in some * cases, but should always be used with caution. the default value * for this parameter is a finite value. * @param nonBlockingInput * true specifies non-blocking input stream behavior * @param nonBlockingOutput * true specifies non-blocking output stream behavior * @param segmentAlloc * pass reference to nsIMemory to have all pipe allocations use this * allocator (pass null to use the default allocator) */ inline nsresult NS_NewPipe(nsIInputStream **pipeIn, nsIOutputStream **pipeOut, PRUint32 segmentSize = 0, PRUint32 maxSize = 0, PRBool nonBlockingInput = PR_FALSE, PRBool nonBlockingOutput = PR_FALSE, nsIMemory *segmentAlloc = nsnull) { PRUint32 segmentCount; if (segmentSize == 0) segmentCount = 0; // use default else segmentCount = maxSize / segmentSize; nsIAsyncInputStream *in; nsIAsyncOutputStream *out; nsresult rv = NS_NewPipe2(&in, &out, nonBlockingInput, nonBlockingOutput, segmentSize, segmentCount, segmentAlloc); if (NS_FAILED(rv)) return rv; *pipeIn = in; *pipeOut = out; return NS_OK; } #endif /* __gen_nsIPipe_h__ */