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* bumped version to 3.8.5
* linda:limit() returns lanes.cancel_error on a limited linda
* lanes.genlock() and lanes.genatomic() support cancelled lindas by
returning lanes.cancel_error whenever appropriate
* fixed a possible Lua stack overflow when calling linda:dump()
* fixed cases where linda:send() and linda:receive() would not return
lanes.cancel_error when they should
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slightly improve linda performance when the producer/consumer scenario
leaves leave the key empty
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* bumped version to 3.7.8
* lane:cancel() now accepts a boolean second argument when soft
cancelling (negative timeout) to wake the thread if necessary
* if a blocked linda send() or receive() call is interrupted by a
cancellation request, it returns CANCEL_ERROR so that this case can be
differentiated from a simple timeout
* fixed WIN32 THREAD_CREATE() wrong _beginthreadex() error detection
* fatal WIN32 threading errors retrieve and output the error description
string with FormatMessage()
* fixed missing lanes.set_singlethreaded
* fixed perftest.lua
* added test/cancel.lua
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* lane:cancel(<negative-timeout>) only causes cancel_test() to return
true but won't interrupt execution of the lane during linda operations
* more explicit errors when trying to transfer unknown source functions
(with new configure option verbose_errors)
* default options wrap allocator around a mutex when run by LuaJIT
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* raise an error if lane generator libs specification contains a lib more than once
* bit32 is a valid lib name in the libs specification (silently ignored by the Lua 5.1 build)
* improved lanes.nameof to search inside table- and userdata- metatables for an object's name
* fixed an unwarranted error when trying to discover a function name upon a failed transfer
* contents of package.[path,cpath,preload,loaders|searchers] are pulled *only once* inside keeper states at initialisation
* Lua function upvalues equal to the global environment aren't copied by value, but bound to the destination's global environment
especially useful for Lua 5.2 _ENV
* fixed loading of base libraries that didn't create the global tables when built for Lua 5.2
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* new method linda:dump() that outputs the full contents of a linda as a table, also linked to __towatch for Decoda support
* linda:receive() API change!
* instead of [val, key], linda:receive( timeout, key) returns [key, val]
* instead of [val, [...]], linda:receive( timeout, linda.batched key) returns [key, val[, ...]]
this is to unify the return values of regular and batched mode, and to be able to tell when batched mode is interrupted by a lane cancellation
* fixed Lua 5.2 build to take into account the "loaders"->"searchers" name change in 'package' module.
* a bit of html cleanup and added some infos in the documentation regarding the Lanes internals
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parameters
* added support for an on_state_create callback called to load custom functions in a state in addition to the base libraries
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when atexit() handlers are processed
* Lua 5.2-style module:
* module() is no longer used to implement lanes.lua
* a global "lanes" variable is no longer created when the module is required
* the Lanes module table is returned instead
* Lanes must be initialized before used:
* the first occurence of 'require "lanes"' produces a minimal interface that only contains a configure() function
* the remainder of the interface is made available once this function is called
* subsequent calls to configure() do nothing
* configure() controls the number of keeper states and the startup of timers
* LuaJIT 2 compatibility
* non-Lua functions are no longer copied by creating a C closure from a C pointer, but through 2-way lookup tables
* this means that if a lane function body pulls non-Lua functions, the lane generator description must contain the list of libraries and modules that exports them
* introduces a change in configuration .globals management: contents are copied *after* std libs are loaded
* new .required configuration entry to list modules that must be require()'ed before lane body is transferred
* lane:cancel() wakes up waiting lindas like what is done at lane shutdown
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* new linda:count() method
* new linda batched data read mode
* proper key type check in all linda methods
* fix setup-vc.cmd to support Visual Studio 2010 and Windows 7 64 bits
* bugfix: release keeper state mutex at desinit
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