diff options
Diffstat (limited to 'indra/llcommon/lleventcoro.cpp')
| -rwxr-xr-x | indra/llcommon/lleventcoro.cpp | 208 |
1 files changed, 16 insertions, 192 deletions
diff --git a/indra/llcommon/lleventcoro.cpp b/indra/llcommon/lleventcoro.cpp index ad02e139b8..81cc33fbba 100755 --- a/indra/llcommon/lleventcoro.cpp +++ b/indra/llcommon/lleventcoro.cpp @@ -34,63 +34,38 @@ #include <map> // std headers // external library headers -#include <boost/dcoroutine/coroutine.hpp> -#include <boost/dcoroutine/future.hpp> // other Linden headers #include "llsdserialize.h" #include "llerror.h" #include "llcoros.h" -namespace +std::string LLEventDetail::listenerNameForCoroImpl(const void* self_id) { - -/** - * waitForEventOn() permits a coroutine to temporarily listen on an - * LLEventPump any number of times. We don't really want to have to ask - * the caller to label each such call with a distinct string; the whole - * point of waitForEventOn() is to present a nice sequential interface to - * the underlying LLEventPump-with-named-listeners machinery. So we'll use - * LLEventPump::inventName() to generate a distinct name for each - * temporary listener. On the other hand, because a given coroutine might - * call waitForEventOn() any number of times, we don't really want to - * consume an arbitrary number of generated inventName()s: that namespace, - * though large, is nonetheless finite. So we memoize an invented name for - * each distinct coroutine instance. - */ -std::string listenerNameForCoro() -{ - // If this coroutine was launched by LLCoros::launch(), find that name. - std::string name(LLCoros::instance().getName()); + // First, if this coroutine was launched by LLCoros::launch(), find that name. + std::string name(LLCoros::instance().getNameByID(self_id)); if (! name.empty()) { return name; } + // Apparently this coroutine wasn't launched by LLCoros::launch(). Check + // whether we have a memo for this self_id. + typedef std::map<const void*, std::string> MapType; + static MapType memo; + MapType::const_iterator found = memo.find(self_id); + if (found != memo.end()) + { + // this coroutine instance has called us before, reuse same name + return found->second; + } // this is the first time we've been called for this coroutine instance name = LLEventPump::inventName("coro"); - LL_INFOS("LLEventCoro") << "listenerNameForCoro(): inventing coro name '" + memo[self_id] = name; + LL_INFOS("LLEventCoro") << "listenerNameForCoroImpl(" << self_id << "): inventing coro name '" << name << "'" << LL_ENDL; return name; } -/** - * Implement behavior described for postAndWait()'s @a replyPumpNamePath - * parameter: - * - * * If <tt>path.isUndefined()</tt>, do nothing. - * * If <tt>path.isString()</tt>, @a dest is an LLSD map: store @a value - * into <tt>dest[path.asString()]</tt>. - * * If <tt>path.isInteger()</tt>, @a dest is an LLSD array: store @a - * value into <tt>dest[path.asInteger()]</tt>. - * * If <tt>path.isArray()</tt>, iteratively apply the rules above to step - * down through the structure of @a dest. The last array entry in @a - * path specifies the entry in the lowest-level structure in @a dest - * into which to store @a value. - * - * @note - * In the degenerate case in which @a path is an empty array, @a dest will - * @em become @a value rather than @em containing it. - */ -void storeToLLSDPath(LLSD& dest, const LLSD& rawPath, const LLSD& value) +void LLEventDetail::storeToLLSDPath(LLSD& dest, const LLSD& rawPath, const LLSD& value) { if (rawPath.isUndefined()) { @@ -143,155 +118,6 @@ void storeToLLSDPath(LLSD& dest, const LLSD& rawPath, const LLSD& value) *pdest = value; } -} // anonymous - -void llcoro::yield() -{ - // By viewer convention, we post an event on the "mainloop" LLEventPump - // each iteration of the main event-handling loop. So waiting for a single - // event on "mainloop" gives us a one-frame yield. - waitForEventOn("mainloop"); -} - -LLSD llcoro::postAndWait(const LLSD& event, const LLEventPumpOrPumpName& requestPump, - const LLEventPumpOrPumpName& replyPump, const LLSD& replyPumpNamePath) -{ - // declare the future - boost::dcoroutines::future<LLSD> future(llcoro::get_self()); - // make a callback that will assign a value to the future, and listen on - // the specified LLEventPump with that callback - std::string listenerName(listenerNameForCoro()); - LLTempBoundListener connection( - replyPump.getPump().listen(listenerName, - voidlistener(boost::dcoroutines::make_callback(future)))); - // skip the "post" part if requestPump is default-constructed - if (requestPump) - { - // If replyPumpNamePath is non-empty, store the replyPump name in the - // request event. - LLSD modevent(event); - storeToLLSDPath(modevent, replyPumpNamePath, replyPump.getPump().getName()); - LL_DEBUGS("lleventcoro") << "postAndWait(): coroutine " << listenerName - << " posting to " << requestPump.getPump().getName() - << LL_ENDL; - - // *NOTE:Mani - Removed because modevent could contain user's hashed passwd. - // << ": " << modevent << LL_ENDL; - requestPump.getPump().post(modevent); - } - LL_DEBUGS("lleventcoro") << "postAndWait(): coroutine " << listenerName - << " about to wait on LLEventPump " << replyPump.getPump().getName() - << LL_ENDL; - // trying to dereference ("resolve") the future makes us wait for it - LLSD value; - { - // instantiate Suspending to manage the "current" coroutine - llcoro::Suspending suspended; - value = *future; - } // destroy Suspending as soon as we're back - LL_DEBUGS("lleventcoro") << "postAndWait(): coroutine " << listenerName - << " resuming with " << value << LL_ENDL; - // returning should disconnect the connection - return value; -} - -namespace -{ - -/** - * This helper is specifically for the two-pump version of waitForEventOn(). - * We use a single future object, but we want to listen on two pumps with it. - * Since we must still adapt from (the callable constructed by) - * boost::dcoroutines::make_callback() (void return) to provide an event - * listener (bool return), we've adapted VoidListener for the purpose. The - * basic idea is that we construct a distinct instance of WaitForEventOnHelper - * -- binding different instance data -- for each of the pumps. Then, when a - * pump delivers an LLSD value to either WaitForEventOnHelper, it can combine - * that LLSD with its discriminator to feed the future object. - */ -template <typename LISTENER> -class WaitForEventOnHelper -{ -public: - WaitForEventOnHelper(const LISTENER& listener, int discriminator): - mListener(listener), - mDiscrim(discriminator) - {} - // this signature is required for an LLEventPump listener - bool operator()(const LLSD& event) - { - // our future object is defined to accept LLEventWithID - mListener(LLEventWithID(event, mDiscrim)); - // don't swallow the event, let other listeners see it - return false; - } -private: - LISTENER mListener; - const int mDiscrim; -}; - -/// WaitForEventOnHelper type-inference helper -template <typename LISTENER> -WaitForEventOnHelper<LISTENER> wfeoh(const LISTENER& listener, int discriminator) -{ - return WaitForEventOnHelper<LISTENER>(listener, discriminator); -} - -} // anonymous - -namespace llcoro -{ - -LLEventWithID postAndWait2(const LLSD& event, - const LLEventPumpOrPumpName& requestPump, - const LLEventPumpOrPumpName& replyPump0, - const LLEventPumpOrPumpName& replyPump1, - const LLSD& replyPump0NamePath, - const LLSD& replyPump1NamePath) -{ - // declare the future - boost::dcoroutines::future<LLEventWithID> future(llcoro::get_self()); - // either callback will assign a value to this future; listen on - // each specified LLEventPump with a callback - std::string name(listenerNameForCoro()); - LLTempBoundListener connection0( - replyPump0.getPump().listen(name + "a", - wfeoh(boost::dcoroutines::make_callback(future), 0))); - LLTempBoundListener connection1( - replyPump1.getPump().listen(name + "b", - wfeoh(boost::dcoroutines::make_callback(future), 1))); - // skip the "post" part if requestPump is default-constructed - if (requestPump) - { - // If either replyPumpNamePath is non-empty, store the corresponding - // replyPump name in the request event. - LLSD modevent(event); - storeToLLSDPath(modevent, replyPump0NamePath, - replyPump0.getPump().getName()); - storeToLLSDPath(modevent, replyPump1NamePath, - replyPump1.getPump().getName()); - LL_DEBUGS("lleventcoro") << "postAndWait2(): coroutine " << name - << " posting to " << requestPump.getPump().getName() - << ": " << modevent << LL_ENDL; - requestPump.getPump().post(modevent); - } - LL_DEBUGS("lleventcoro") << "postAndWait2(): coroutine " << name - << " about to wait on LLEventPumps " << replyPump0.getPump().getName() - << ", " << replyPump1.getPump().getName() << LL_ENDL; - // trying to dereference ("resolve") the future makes us wait for it - LLEventWithID value; - { - // instantiate Suspending to manage "current" coroutine - llcoro::Suspending suspended; - value = *future; - } // destroy Suspending as soon as we're back - LL_DEBUGS("lleventcoro") << "postAndWait(): coroutine " << name - << " resuming with (" << value.first << ", " << value.second << ")" - << LL_ENDL; - // returning should disconnect both connections - return value; -} - LLSD errorException(const LLEventWithID& result, const std::string& desc) { // If the result arrived on the error pump (pump 1), instead of @@ -318,5 +144,3 @@ LLSD errorLog(const LLEventWithID& result, const std::string& desc) // A simple return must therefore be from the reply pump (pump 0). return result.first; } - -} // namespace llcoro |