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Two sleep() methods: one accepting F32Milliseconds, or in general any LLUnits
time class; the other accepting any std::chrono::duration.
The significant thing about each of these sleep() methods, as opposed to any
freestanding sleep() function, is that it only sleeps until the app starts
shutdown. Moreover, it returns true if it slept for the whole specified
duration, false if it woke for app shutdown.
This is accomplished by making LLApp::sStatus be an LLScalarCond<EAppStatus>
instead of a plain EAppStatus enum, and by making setStatus() call set_all()
each time the value changes. Then each new sleep() method can call
wait_for_unequal(duration, APP_STATUS_RUNNING).
Introducing llcond.h into llapp.h triggered an #include circularity because
llthread.h #included llapp.h even though it didn't reference anything from it.
Removed. This, in turn, necessitated adding #include "llapp.h" to several .cpp
files that reference LLApp but had been depending on other header files to
drag in llapp.h.
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LLThread::currentID() used to return a U32, a distinct unsigned value
incremented by explicitly constructing LLThread or by calling LLThread::
registerThreadID() early in a thread launched by other means. The latter
imposed an unobvious requirement on new code based on std::thread. Using
std::thread::id instead delegates to the compiler/library the problem of
distinguishing threads launched by any means.
Change lots of explicit U32 declarations. Introduce LLThread::id_t typedef to
avoid having to run around fixing uses again if we later revisit this decision.
LLMutex, which stores an LLThread::id_t, wants a distinguished value meaning
NO_THREAD, and had an enum with that name. But as std::thread::id promises
that the default-constructed value is distinct from every valid value,
NO_THREAD becomes unnecessary and goes away.
Because LLMutex now stores LLThread::id_t instead of U32, make llmutex.h
#include "llthread.h" instead of the other way around. This makes LLMutex an
incomplete type within llthread.h, so move LLThread::lockData() and
unlockData() to the .cpp file. Similarly, remove llrefcount.h's #include
"llmutex.h" to break circularity; instead forward-declare LLMutex.
It turns out that a number of source files assumed that #include "llthread.h"
would get the definition for LLMutex. Sprinkle #include "llmutex.h" as needed.
In the SAFE_SSL code in llcorehttp/httpcommon.cpp, there's an ssl_thread_id()
callback that returns an unsigned long to the SSL library. When LLThread::
currentID() was U32, we could simply return that. But std::thread::id is very
deliberately opaque, and can't be reinterpret_cast to unsigned long.
Fortunately it can be hashed because std::hash is specialized with that type.
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Have the ::notifyLoadedMeshes() method doing correct locking
and stall avoidance at the same time. This method now does
lazy mutex lock acquisition (trylock()) and if it fails on
either, it gives up and comes back later. Capture the maximum
number of sequential failures and report this at the end of
the run in the log. (So far, with big mesh regions, I've
only seen 1s and 2s.) Locking/mutex requirements sorted in
other locations as well. LLMutex gets trylock() method as
well as new LLMutexTrylock scoped locking class. Clean up
some documentation, more to do.
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dependency cleanup - removed a lot of unecessary includes
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dependencies
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Reviewed by Kelly
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changed thread id declaration to be local to llthread.cpp and use
currentID() uniformly across platforms
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fixes to merge
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eliminated min and max macros from windows.h
got rest of viewer to compile against llfasttimer changes
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out-of-order deletion of LLTextureFetch on shutdown
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cleaned up API
samplers are now value types with copy-on-write buffers under the hood
removed coupling with LLThread
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created separate constructor for static allocation of sampler buffer
fixed start/stop/resume semantics of samplers and added sampler time interval tracking
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slave threads now pushing data to master thread
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fixed various issues related to unit tests and LLThreadLocalPtr initialization and teardown
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moved LLThread::lockData and unlockData back to header
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moved LLThreadLocalPtr to llapr
fixed various startup race conditions for LLThreadLocalPtr
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added LLThreadLocalPtr
broke llmutex out into llmutex.h
got primary sampling buffer under thread local storage
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Two fairly simple conflicts: dead stats sending code in the
texture fetch code (new llcorehttp library) and the cleanup
code in llappviewer was moved around in 3.4.x.
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LLProxy support, HttpOptions starting to work, HTTP resource waiting fixed.
Non-LLThread-based threads need to do some registration or LLMutex locks taken out in these
threads will not work as expected (SH-3154). We'll get a better solution later, this fixes
some things for now. Tracing of operations now supported. Global and per-request (via
HttpOptions) tracing levels of [0..3]. The 2 and 3 levels use libcurl's VERBOSE mode
combined with CURLOPT_DEBUGFUNCTION to stream high levels of detail into the log. *Very*
laggy but useful. Simple GET request supported (no Range: header). Really just a
degenrate case of a ranged get but supplied an API anyway. Global option to use the
LLProxy interface to setup CURL handles for either socks5 or http proxy usage. This
isn't really the most encapsulated way to do this but a better solution will have to
come later. The wantHeaders and tracing options are now supported in HttpOptions giving
per-request controls. Big refactoring of the HTTP resource waiter in lltexturefetch.
What I was doing before wasn't correct. Instead, I'm implementing the resource wait
after the Semaphore model (though not using system semaphores). So instead of having
a sequence like: SEND_HTTP_REQ -> WAIT_HTTP_RESOURCE -> SEND_HTTP_REQ, we now
do WAIT_HTTP_RESOURCE -> WAIT_HTTP_RESOURCE2 (actual wait) -> SEND_HTTP_REQ. Works
well but the prioritized filling of the corehttp library needs some performance
work later.
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phase 2, removal of extraneous signaling in favor of llnotificationchannels
made notificationchannels work better with overrides and lifetime managed
by creator
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and LLBufferArray::copyIntoBuffers
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SH-2738: Texture fetching freezes due to LLcurl
SH-2777: viewer crashed on logout in LLCurl::Easy::releaseEasyHandle
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This fixes a potential resource leak whereby the destructor for
LLCondition, which derives from LLMutex, is never called.
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