Cancellation improvements and some fixes

* 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

1 files changed, 4 insertions, 4 deletions

diff --git a/tests/linda_perf.lua b/tests/linda_perf.lua
index ebe9eac..9348f71 100644
--- a/tests/linda_perf.lua
+++ b/tests/linda_perf.lua
@@ -34,7 +34,7 @@ local function ziva( preloop, loop, batch)
         -- prefill the linda a bit to increase fifo stress
         local top = math.max( preloop, loop)
         local l, lane = lanes.linda()
-        local t1 = os.time()
+        local t1 = lanes.now_secs()
         for i = 1, preloop do
                 l:send( "key", i)
         end
@@ -59,7 +59,7 @@ local function ziva( preloop, loop, batch)
         end
         l:send( "done" ,"are you happy?")
         lane:join()
-        return os.difftime(os.time(), t1)
+        return lanes.now_secs() - t1
 end
 
 local tests =
@@ -149,7 +149,7 @@ local function ziva2( preloop, loop, batch)
                         l:receive( "key")
                 end
         end
-        local t1 = os.time()
+        local t1 = lanes.now_secs()
         -- first, prime the linda with some data
         for i = 1, preloop, step do
                 batch_send()
@@ -165,7 +165,7 @@ local function ziva2( preloop, loop, batch)
         for i = 1, preloop, step do
                         batch_read()
         end
-        return os.difftime(os.time(), t1)
+        return lanes.now_secs() - t1
 end
 
 local tests2 =