Integrate llcorehttp library into lltexturefetch design.

This is the first functional viewer pass with the HTTP work of the texture fetch
code performed by the llcorehttp library.  Not exactly a 'drop-in' replacement
but a work-alike with some changes (e.g. handler notification in consumer
thread versus responder notification in worker thread).

This also includes some temporary changes in the priority scheme to prevent
the kind of priority inversion found in VWR-28996.  Scheme used here does
provide liveness if not optimal responsiveness or order-of-operation.

The llcorehttp library at this point is far from optimally performing.
Its worker thread is making relatively poor use of cycles it gets and
it doesn't idle or sleep intelligently yet.  This early integration step
helps shake out the interfaces, implementation niceties will be covered
soon.

1 files changed, 17 insertions, 0 deletions

diff --git a/indra/llcorehttp/httprequest.cpp b/indra/llcorehttp/httprequest.cpp
index 2a87f5231a..6c62f931ff 100644
--- a/indra/llcorehttp/httprequest.cpp
+++ b/indra/llcorehttp/httprequest.cpp
@@ -31,6 +31,7 @@
 #include "_httpservice.h"
 #include "_httpoperation.h"
 #include "_httpoprequest.h"
+#include "_httpopcancel.h"
 
 
 namespace
@@ -189,6 +190,22 @@ HttpHandle HttpRequest::requestGetByteRange(unsigned int policy_id,
 }
 
 
+HttpHandle HttpRequest::requestCancel(HttpHandle handle, HttpHandler * user_handler)
+{
+	HttpStatus status;
+	HttpHandle ret_handle(LLCORE_HTTP_HANDLE_INVALID);
+
+	HttpOpCancel * op = new HttpOpCancel(handle);
+	op->setHandlers(mReplyQueue, mSelfHandler, user_handler);
+	mRequestQueue->addOp(op);			// transfer refcount as well
+
+	mLastReqStatus = status;
+	ret_handle = static_cast<HttpHandle>(op);
+	
+	return ret_handle;
+}
+
+
 HttpHandle HttpRequest::requestNoOp(HttpHandler * user_handler)
 {
 	HttpStatus status;