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\alias{gInputStreamReadAsync}
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\name{gInputStreamReadAsync}
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\title{gInputStreamReadAsync}
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\description{Request an asynchronous read of \code{count} bytes from the stream into the buffer
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starting at \code{buffer}. When the operation is finished \code{callback} will be called.
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You can then call \code{\link{gInputStreamReadFinish}} to get the result of the
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\usage{gInputStreamReadAsync(object, count, io.priority = 0, cancellable = NULL, callback, user.data = NULL)}
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\item{\verb{object}}{A \code{\link{GInputStream}}.}
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\item{\verb{count}}{the number of bytes that will be read from the stream}
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\item{\verb{io.priority}}{the I/O priority
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\item{\verb{cancellable}}{optional \code{\link{GCancellable}} object, \code{NULL} to ignore.}
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\item{\verb{callback}}{callback to call when the request is satisfied}
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\item{\verb{user.data}}{the data to pass to callback function}
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\details{During an async request no other sync and async calls are allowed on \code{stream}, and will
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result in \code{G_IO_ERROR_PENDING} errors.
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A value of \code{count} larger than \code{G_MAXSSIZE} will cause a \code{G_IO_ERROR_INVALID_ARGUMENT} error.
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On success, the number of bytes read into the buffer will be passed to the
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callback. It is not an error if this is not the same as the requested size, as it
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can happen e.g. near the end of a file, but generally we try to read
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as many bytes as requested. Zero is returned on end of file
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(or if \code{count} is zero), but never otherwise.
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Any outstanding i/o request with higher priority (lower numerical value) will
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be executed before an outstanding request with lower priority. Default
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priority is \code{G_PRIORITY_DEFAULT}.
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The asyncronous methods have a default fallback that uses threads to implement
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asynchronicity, so they are optional for inheriting classes. However, if you
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override one you must override all.}
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A list containing the following elements:
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\item{\verb{buffer}}{a buffer to read data into (which should be at least count bytes long).}
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\author{Derived by RGtkGen from GTK+ documentation}
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man/gInputStreamReadAsync.Rd
