path: root/test/-ext-/gvl
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authornormal <normal@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2019-01-04 13:14:11 +0000
committernormal <normal@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2019-01-04 13:14:11 +0000
commit23444302d9200bcc41ce279a529f73cad63c3f05 (patch)
treecb541d972fd43a434593dca6c3aebcfcdd8fe560 /test/-ext-/gvl
parent16cfd26a57c30e17bc3c116c83134420693ba5c4 (diff)
introduce rb_nogvl C-API to mark ubf as async-signal-safe
zlib and bignum both contain unblocking functions which are async-signal-safe and do not require spawning additional threads. We can execute those functions directly in signal handlers without incurring overhead of extra threads, so provide C-API users the ability to deal with that. Other C-API users may have similar need. This flexible API can supercede existing uses of rb_thread_call_without_gvl and rb_thread_call_without_gvl2 by introducing a flags argument to control behavior. Note: this API is NOT finalized. It needs approval from other committers. I prefer shorter name than previous rb_thread_call_without_gvl* functions because my eyes requires big fonts. [Bug #15499] git-svn-id: svn+ssh:// b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'test/-ext-/gvl')
1 files changed, 20 insertions, 0 deletions
diff --git a/test/-ext-/gvl/test_ubf_async_safe.rb b/test/-ext-/gvl/test_ubf_async_safe.rb
new file mode 100644
index 00000000000..85c4a7d38ef
--- /dev/null
+++ b/test/-ext-/gvl/test_ubf_async_safe.rb
@@ -0,0 +1,20 @@
+# frozen_string_literal: true
+class TestUbfAsyncSafe < Test::Unit::TestCase
+ def test_ubf_async_safe
+ skip 'need fork for single-threaded test' unless Process.respond_to?(:fork)
+ IO.pipe do |r, w|
+ pid = fork do
+ require '-test-/gvl/call_without_gvl'
+ r.close
+ trap(:INT) { exit!(0) }
+ Thread.current.__ubf_async_safe__(w.fileno)
+ exit!(1)
+ end
+ w.close
+ assert[r], nil, nil, 30), 'child did not become ready'
+ Process.kill(:INT, pid)
+ _, st = Process.waitpid2(pid)
+ assert_predicate st, :success?, ':INT signal triggered exit'
+ end
+ end