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netwerk/base/src/nsBaseContentStream.cpp@6474c204b198 (annotated)

netwerk/base/src/nsBaseContentStream.cpp

Wed, 31 Dec 2014 06:09:35 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Wed, 31 Dec 2014 06:09:35 +0100

changeset 0

6474c204b198

permissions

-rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

michael@0	1	/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
michael@0	2	/* This Source Code Form is subject to the terms of the Mozilla Public
michael@0	3	* License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0	4	* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0	5
michael@0	6	#include "nsBaseContentStream.h"
michael@0	7	#include "nsStreamUtils.h"
michael@0	8
michael@0	9	//-----------------------------------------------------------------------------
michael@0	10
michael@0	11	void
michael@0	12	nsBaseContentStream::DispatchCallback(bool async)
michael@0	13	{
michael@0	14	if (!mCallback)
michael@0	15	return;
michael@0	16
michael@0	17	// It's important to clear mCallback and mCallbackTarget up-front because the
michael@0	18	// OnInputStreamReady implementation may call our AsyncWait method.
michael@0	19
michael@0	20	nsCOMPtr<nsIInputStreamCallback> callback;
michael@0	21	if (async) {
michael@0	22	callback = NS_NewInputStreamReadyEvent(mCallback, mCallbackTarget);
michael@0	23	mCallback = nullptr;
michael@0	24	} else {
michael@0	25	callback.swap(mCallback);
michael@0	26	}
michael@0	27	mCallbackTarget = nullptr;
michael@0	28
michael@0	29	callback->OnInputStreamReady(this);
michael@0	30	}
michael@0	31
michael@0	32	//-----------------------------------------------------------------------------
michael@0	33	// nsBaseContentStream::nsISupports
michael@0	34
michael@0	35	NS_IMPL_ADDREF(nsBaseContentStream)
michael@0	36	NS_IMPL_RELEASE(nsBaseContentStream)
michael@0	37
michael@0	38	// We only support nsIAsyncInputStream when we are in non-blocking mode.
michael@0	39	NS_INTERFACE_MAP_BEGIN(nsBaseContentStream)
michael@0	40	NS_INTERFACE_MAP_ENTRY(nsIInputStream)
michael@0	41	NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsIAsyncInputStream, mNonBlocking)
michael@0	42	NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIInputStream)
michael@0	43	NS_INTERFACE_MAP_END_THREADSAFE
michael@0	44
michael@0	45	//-----------------------------------------------------------------------------
michael@0	46	// nsBaseContentStream::nsIInputStream
michael@0	47
michael@0	48	NS_IMETHODIMP
michael@0	49	nsBaseContentStream::Close()
michael@0	50	{
michael@0	51	return IsClosed() ? NS_OK : CloseWithStatus(NS_BASE_STREAM_CLOSED);
michael@0	52	}
michael@0	53
michael@0	54	NS_IMETHODIMP
michael@0	55	nsBaseContentStream::Available(uint64_t *result)
michael@0	56	{
michael@0	57	*result = 0;
michael@0	58	return mStatus;
michael@0	59	}
michael@0	60
michael@0	61	NS_IMETHODIMP
michael@0	62	nsBaseContentStream::Read(char *buf, uint32_t count, uint32_t *result)
michael@0	63	{
michael@0	64	return ReadSegments(NS_CopySegmentToBuffer, buf, count, result);
michael@0	65	}
michael@0	66
michael@0	67	NS_IMETHODIMP
michael@0	68	nsBaseContentStream::ReadSegments(nsWriteSegmentFun fun, void *closure,
michael@0	69	uint32_t count, uint32_t *result)
michael@0	70	{
michael@0	71	*result = 0;
michael@0	72
michael@0	73	if (mStatus == NS_BASE_STREAM_CLOSED)
michael@0	74	return NS_OK;
michael@0	75
michael@0	76	// No data yet
michael@0	77	if (!IsClosed() && IsNonBlocking())
michael@0	78	return NS_BASE_STREAM_WOULD_BLOCK;
michael@0	79
michael@0	80	return mStatus;
michael@0	81	}
michael@0	82
michael@0	83	NS_IMETHODIMP
michael@0	84	nsBaseContentStream::IsNonBlocking(bool *result)
michael@0	85	{
michael@0	86	*result = mNonBlocking;
michael@0	87	return NS_OK;
michael@0	88	}
michael@0	89
michael@0	90	//-----------------------------------------------------------------------------
michael@0	91	// nsBaseContentStream::nsIAsyncInputStream
michael@0	92
michael@0	93	NS_IMETHODIMP
michael@0	94	nsBaseContentStream::CloseWithStatus(nsresult status)
michael@0	95	{
michael@0	96	if (IsClosed())
michael@0	97	return NS_OK;
michael@0	98
michael@0	99	NS_ENSURE_ARG(NS_FAILED(status));
michael@0	100	mStatus = status;
michael@0	101
michael@0	102	DispatchCallback();
michael@0	103	return NS_OK;
michael@0	104	}
michael@0	105
michael@0	106	NS_IMETHODIMP
michael@0	107	nsBaseContentStream::AsyncWait(nsIInputStreamCallback *callback,
michael@0	108	uint32_t flags, uint32_t requestedCount,
michael@0	109	nsIEventTarget *target)
michael@0	110	{
michael@0	111	// Our _only_ consumer is nsInputStreamPump, so we simplify things here by
michael@0	112	// making assumptions about how we will be called.
michael@0	113	NS_ASSERTION(target, "unexpected parameter");
michael@0	114	NS_ASSERTION(flags == 0, "unexpected parameter");
michael@0	115	NS_ASSERTION(requestedCount == 0, "unexpected parameter");
michael@0	116
michael@0	117	#ifdef DEBUG
michael@0	118	bool correctThread;
michael@0	119	target->IsOnCurrentThread(&correctThread);
michael@0	120	NS_ASSERTION(correctThread, "event target must be on the current thread");
michael@0	121	#endif
michael@0	122
michael@0	123	mCallback = callback;
michael@0	124	mCallbackTarget = target;
michael@0	125
michael@0	126	if (!mCallback)
michael@0	127	return NS_OK;
michael@0	128
michael@0	129	// If we're already closed, then dispatch this callback immediately.
michael@0	130	if (IsClosed()) {
michael@0	131	DispatchCallback();
michael@0	132	return NS_OK;
michael@0	133	}
michael@0	134
michael@0	135	OnCallbackPending();
michael@0	136	return NS_OK;
michael@0	137	}