// Called on the worker thread.
bool
BackgroundFileSaver::CheckCompletion()
{
nsresult rv;
MOZ_ASSERT(!mAsyncCopyContext,
"Should not be copying when checking completion conditions.");
bool failed = true;
{
MutexAutoLock lock(mLock);
if (mComplete) {
return true;
}
// If an error occurred, we don't need to do the checks in this code block,
// and the operation can be completed immediately with a failure code.
if (NS_SUCCEEDED(mStatus)) {
failed = false;
// We did not incur in an error, so we must determine if we can stop now.
// If the Finish method has not been called, we can just continue now.
if (!mFinishRequested) {
return false;
}
// We can only stop when all the operations requested by the control
// thread have been processed. First, we check whether we have processed
// the first SetTarget call, if any. Then, we check whether we have
// processed any rename requested by subsequent SetTarget calls.
if ((mInitialTarget && !mActualTarget) ||
(mRenamedTarget && mRenamedTarget != mActualTarget)) {
return false;
}
// If we still have data to write to the output file, allow the copy
// operation to resume. The Available getter may return an error if one
// of the pipe's streams has been already closed.
uint64_t available;
rv = mPipeInputStream->Available(&available);
if (NS_SUCCEEDED(rv) && available != 0) {
return false;
}
}
mComplete = true;
}
// Ensure we notify completion now that the operation finished.
// Do a best-effort attempt to remove the file if required.
if (failed && mActualTarget && !mActualTargetKeepPartial) {
(void)mActualTarget->Remove(false);
}
// Finish computing the hash
if (!failed && mDigestContext) {
nsNSSShutDownPreventionLock lock;
if (!isAlreadyShutDown()) {
Digest d;
rv = d.End(SEC_OID_SHA256, mDigestContext);
if (NS_SUCCEEDED(rv)) {
MutexAutoLock lock(mLock);
mSha256 = nsDependentCSubstring(char_ptr_cast(d.get().data),
d.get().len);
}
}
}
// Compute the signature of the binary. ExtractSignatureInfo doesn't do
// anything on non-Windows platforms except return an empty nsIArray.
if (!failed && mActualTarget) {
nsString filePath;
mActualTarget->GetTarget(filePath);
nsresult rv = ExtractSignatureInfo(filePath);
if (NS_FAILED(rv)) {
LOG(("Unable to extract signature information [this = %p].", this));
} else {
LOG(("Signature extraction success! [this = %p]", this));
}
}
// Post an event to notify that the operation completed.
if (NS_FAILED(mControlThread->Dispatch(NewRunnableMethod(this,
&BackgroundFileSaver::NotifySaveComplete),
NS_DISPATCH_NORMAL))) {
NS_WARNING("Unable to post completion event to the control thread.");
}
return true;
}
// Called on the worker thread.
bool
BackgroundFileSaver::CheckCompletion()
{
nsresult rv;
MOZ_ASSERT(!mAsyncCopyContext,
"Should not be copying when checking completion conditions.");
bool failed = true;
{
MutexAutoLock lock(mLock);
if (mComplete) {
return true;
}
// If an error occurred, we don't need to do the checks in this code block,
// and the operation can be completed immediately with a failure code.
if (NS_SUCCEEDED(mStatus)) {
failed = false;
// On success, if there is a pending rename operation, we must process it
// before finishing. Otherwise, we can finish now if requested.
if ((mAssignedTarget && mAssignedTarget != mActualTarget) ||
!mFinishRequested) {
return false;
}
// If completion was requested, but we still have data to write to the
// output file, allow the copy operation to resume. The Available getter
// may return an error if one of the pipe's streams has been already closed.
uint64_t available;
rv = mPipeInputStream->Available(&available);
if (NS_SUCCEEDED(rv) && available != 0) {
return false;
}
}
mComplete = true;
}
// Ensure we notify completion now that the operation finished.
// Do a best-effort attempt to remove the file if required.
if (failed && mActualTarget && !mActualTargetKeepPartial) {
(void)mActualTarget->Remove(false);
}
// Finish computing the hash
if (!failed && mDigestContext) {
nsNSSShutDownPreventionLock lock;
if (!isAlreadyShutDown()) {
Digest d;
rv = d.End(SEC_OID_SHA256, mDigestContext);
if (NS_SUCCEEDED(rv)) {
MutexAutoLock lock(mLock);
mSha256 = nsDependentCSubstring(char_ptr_cast(d.get().data),
d.get().len);
}
}
}
// Post an event to notify that the operation completed.
nsCOMPtr<nsIRunnable> event =
NS_NewRunnableMethod(this, &BackgroundFileSaver::NotifySaveComplete);
if (!event ||
NS_FAILED(mControlThread->Dispatch(event, NS_DISPATCH_NORMAL))) {
NS_WARNING("Unable to post completion event to the control thread.");
}
return true;
}