viewer.git - Megapahit's fork of the Second Life viewer.

Age	Commit message (Collapse)	Author
2012-11-14	SH-3406 WIP convert fast timers to lltrace system	Richard Linden
	cleaning up build moved most includes of windows.h to llwin32headers.h to disable min/max macros, etc streamlined Time class and consolidated functionality in BlockTimer class llfasttimer is no longer included via llstring.h, so had to add it manually in several places
2012-06-06	MAINT-1144: Defend against NULL LLPluginProcessParent::mProcess.	Nat Goodspeed
	The change from LLProcessLauncher to LLProcess introduces the possibility of a NULL (default-constructed) LLProcessPtr. Add certain static LLProcess methods accepting LLProcessPtr, forwarding to nonstatic method when non-NULL but doing something reasonable with NULL. Use these methods in LLPLuginProcessParent.
2012-03-15	Promote LLProcess::ReadPipe::size() to BasePipe (hence WritePipe).	Nat Goodspeed
	Certain use cases need to know whether the WritePipe buffer has been flushed to the pipe, or is still pending.
2012-02-29	Guarantee LLProcess::Params::postend listener any ReadPipe data.	Nat Goodspeed
	Previously one might get process-terminated notification but still have to wait for the child process's final data to arrive on one or more ReadPipes. That required complex consumer timing logic to handle incomplete pending ReadPipe data, e.g. a partial last line with no terminating newline. New code guarantees that by the time LLProcess sends process-terminated notification, all pending pipe data will have been buffered in ReadPipes. Document LLProcess::ReadPipe::getPump() notification event; add "eof" key. Add LLProcess::ReadPipe::getline() and read() convenience methods. Add static LLProcess::getline() and basename() convenience methods, publishing logic already present elsewhere. Use ReadPipe::getline() and read() in unit tests. Add unit test for "eof" event on ReadPipe::getPump(). Add unit test verifying that final data have been buffered by termination notification event.
2012-02-23	Tighten up LLProcess pipe support, per Richard's code review.	Nat Goodspeed
	Clarify wording in some of the doc comments; be a bit more explicit about some of the parameter fields. Make some query methods 'const'. Change default LLProcess::ReadPipe::getLimit() value to 0: don't post any incoming data with notification event unless caller requests it. But do post pertinent FILESLOT in case caller reuses same listener for both stdout and stderr. Use more idiomatic, readable syntax for accessing LLProcess::Params data.
2012-02-20	Let LLProcess consumer specify desired description for logging.	Nat Goodspeed
	If caller runs (e.g.) a Python script, it's not very helpful to a human log reader to keep seeing LLProcess instances logged as /pathname/to/python (pid). If caller is aware, the code can at least use the script name as the desc -- or maybe even a hint as to the script's purpose. If caller doesn't explicitly pass a desc, at least shorten to just the basename of the executable.
2012-02-20	Make LLProcess post termination event to specified pump if desired.	Nat Goodspeed
	This way a caller need not spin on isRunning(); we can just listen for the requested termination event. Post a similar event containing error message if for any reason LLProcess::create() failed to launch the child. Add unit tests for both cases.
2012-02-16	Attempt to fix Windows link error for LLProcess::BasePipe::npos.	Nat Goodspeed

2012-02-16	Add LLProcess::ReadPipe::find() methods, with corresponding npos.	Nat Goodspeed
	If it's useful to have contains() to tell you whether incoming data contains a particular substring, and if it's useful for contains() and peek() to accept an offset within that data, then it's useful to allow you to get the offset of a desired substring within that data. But of course a find() returning offset needs something like std::string::npos for "not found"; borrow that convention. Support both find(const std::string&) and find(char); the latter permits a more efficient implementation. In fact, make find(string) recognize a string of length 1 and leverage the find(char) implementation. Given that, reimplement contains(mumble) as shorthand for find(mumble) != npos. Implement find() overloads using std::search() and std::find() on boost::asio::streambuf character iterators, rather than copying to std::string and then using string search like previous contains() implementation. Reimplement WritePipeImpl::tick() and ReadPipeImpl::tick() to write/read directly from/to boost::asio::streambuf data, instead of copying to/from a temporary flat buffer. As long as ReadPipeImpl::tick() keeps successfully filling buffers, keep reading. Previous implementation would only handle a long child write over successive tick() calls. Stop on read error or when we come up short.
2012-02-15	Add LLProcess::ReadPipe::size(), peek(), contains().	Nat Goodspeed
	Also add "len" key to event data on LLProcess::getPump(). If you've used setLimit(), event["data"].length() may not reflect the length of the accumulated data in the ReadPipe. Add unit test with stdin/stdout handshake with child process.
2012-02-15	Preliminary pipe support for LLProcess.	Nat Goodspeed
	Add LLProcess::FileParam to specify how to construct each child's standard file slot, with lots of comments about features designed but not yet implemented. The point is to design it with enough flexibility to be able to extend to foreseeable use cases. Add LLProcess::Params::files to collect up to 3 FileParam items. Naturally this extends the accepted LLSD syntax as well. Implement type="" (child inherits parent file descriptor) and "pipe" (parent constructs anonymous pipe to pass to child). Add LLProcess::FILESLOT enum, plus methods: getReadPipe(FILESLOT), getOptReadPipe(FILESLOT) getWritePipe(), getOptWritePipe() getPipeName(FILESLOT): placeholder implementation for now Add LLProcess::ReadPipe and WritePipe classes, as returned by getPipe(). WritePipe supports get_ostream() method for streaming to child stdin. ReadPipe supports get_istream() method for reading from child stdout/stderr. It also provides getPump() returning LLEventPump& so interested parties can listen for arrival of new data on the aforementioned std::istream. For "pipe" slots, instantiate appropriate Pipe class. ReadPipe and WritePipe classes are pure virtual bases for ReadPipeImpl and WritePipeImpl, respectively: all implementation data are hidden in the latter classes, visible only in llprocess.cpp. In fact each *PipeImpl class registers itself for "mainloop" ticks, attempting nonblocking I/O to the underlying apr_file_t on each tick. Data are buffered in a boost::asio::streambuf, which bridges between std::[io]stream and the APR I/O calls. Sanity-test ReadPipeImpl by using a pipe to absorb the Python "SyntaxError" output from the successful syntax_error test, rather than alarming the user. Add first few unit tests for validating FileParam. More tests coming!
2012-02-13	Use per-frame ticks on "mainloop" LLEventPump to update LLProcess.	Nat Goodspeed
	When we reimplemented LLProcess on APR, necessitating APR's funny callback mechanism to sense child-process status, every isRunning() or getStatus() call called the APR poll function that calls ALL registered LLProcess callbacks. In other words, every time any consumer called any LLProcess::isRunning() method, all LLProcess callbacks were redundantly fired. Change that so that the single APR poll function is called once per frame, courtesy of the "mainloop" LLEventPump. Once per viewer frame should be well within the realtime duration in which it's reasonable to expect child-process status to change. In effect, this changes LLProcess's public API to introduce a dependency on "mainloop" ticks. Add such ticks to llprocess_test.cpp as well.
2012-02-07	On Linux, #undef Status: we use that name for nested LLProcess struct.	Nat Goodspeed
	Apparently something in the Linux system header chain #defines a macro Status as 'int'. That's just Bad in C++ land. It should at the very least be a typedef! #undefining it in llprocess.h permits the viewer to build.
2012-02-07	Convert LLProcess implementation from platform-specific to using APR.	Nat Goodspeed
	Include logic to engage Linden apr_procattr_autokill_set() extension: on Windows, magic CreateProcess() flag must be pushed down into apr_proc_create() level. When using an APR package without that extension, present implementation should lock (e.g.) SLVoice.exe lifespan to viewer's on Windows XP but probably won't on Windows 7: need magic flag on CreateProcess(). Using APR child-termination callback requires us to define state (e.g. LLProcess::RUNNING). Take the opportunity to present Status, capturing state and (if terminated) rc or signal number; but since most of the time all caller really wants is to log the outcome, also present status string, encapsulating logic to examine state and describe exited-with-rc vs. killed-by-signal. New Status logic may report clearer results in the case of a Windows child process killed by exception. Clarify that static LLProcess::isRunning(handle) overload is only for use when the original LLProcess object has been destroyed: really only for unit tests. We necessarily retain our original platform-specific implementations for just that one method. (Nonstatic isRunning() no longer calls static method.) Clarify log output from llprocess_test.cpp in a couple places.
2012-01-30	Expose 'handle' as well as 'id' on LLProcess objects.	Nat Goodspeed
	On Posix, these and the corresponding getProcessID()/getProcessHandle() accessors produce the same pid_t value; but on Windows, it's useful to distinguish an int-like 'id' useful to human log readers versus an opaque 'handle' for passing to platform-specific API functions. So make the distinction in a platform-independent way.
2012-01-23	Clarify that items in LLProcess::Params::args are implicitly quoted.	Nat Goodspeed
	That is, we try to pass through each args entry as a separate child-process arvg[] entry, whitespace and all.
2012-01-22	Add LLProcess logging on launch(), kill(), isRunning().	Nat Goodspeed
	Much as I dislike viewer log spam, seems to me starting a child process, killing it and observing its termination are noteworthy events. New logging makes LLExternalEditor launch message redundant; removed.
2012-01-22	Make LLProcess::Params streamable; use that in LLExternalEditor.	Nat Goodspeed

2012-01-20	Define LLProcess::Params; accept create(const LLSDParamAdapter<Params>&).	Nat Goodspeed
	This allows callers to pass either LLSD formatted as before -- which all callers still do -- or an actual LLProcess::Params block.
2012-01-20	Per Richard, replace LLProcessLauncher with LLProcess.	Nat Goodspeed
	LLProcessLauncher had the somewhat fuzzy mandate of (1) accumulating parameters with which to launch a child process and (2) sometimes tracking the lifespan of the ensuing child process. But a valid LLProcessLauncher object might or might not have ever been associated with an actual child process. LLProcess specifically tracks a child process. In effect, it's a fairly thin wrapper around a process HANDLE (on Windows) or pid_t (elsewhere), with lifespan management thrown in. A static LLProcess::create() method launches a new child; create() accepts an LLSD bundle with child parameters. So building up a parameter bundle is deferred to LLSD rather than conflated with the process management object. Reconcile all known LLProcessLauncher consumers in the viewer code base, notably the class unit tests.