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author | Iulian Dragos <jaguarul@gmail.com> | 2010-06-09 15:49:53 +0000 |
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committer | Iulian Dragos <jaguarul@gmail.com> | 2010-06-09 15:49:53 +0000 |
commit | f8429e2fcd23ebfdb67203e86cf6002445c77a63 (patch) | |
tree | a78b797507da749fb26d800c200719037ef5fb8d /test | |
parent | 0f5d5c58ec964d8769e0d538efe5e4d14563fd0a (diff) | |
download | scala-f8429e2fcd23ebfdb67203e86cf6002445c77a63.tar.gz scala-f8429e2fcd23ebfdb67203e86cf6002445c77a63.tar.bz2 scala-f8429e2fcd23ebfdb67203e86cf6002445c77a63.zip |
Make local lazy values thread-safe.
is now guaranteed to be initialized at most once, even when accessed
from different threads. Closes #3007, review by odersky.
Diffstat (limited to 'test')
-rw-r--r-- | test/files/run/lazy-concurrent.check | 1 | ||||
-rw-r--r-- | test/files/run/lazy-concurrent.scala | 17 |
2 files changed, 18 insertions, 0 deletions
diff --git a/test/files/run/lazy-concurrent.check b/test/files/run/lazy-concurrent.check new file mode 100644 index 0000000000..33cff9d4f8 --- /dev/null +++ b/test/files/run/lazy-concurrent.check @@ -0,0 +1 @@ +Initializing singleton. diff --git a/test/files/run/lazy-concurrent.scala b/test/files/run/lazy-concurrent.scala new file mode 100644 index 0000000000..4699ed6a15 --- /dev/null +++ b/test/files/run/lazy-concurrent.scala @@ -0,0 +1,17 @@ +object Test { + def main(args: Array[String]) { + class Singleton { + val field = () + println("Initializing singleton.") + } + lazy val Singleton = new Singleton + + var i = 0 + while (i < 4) { + new Thread(new Runnable { + def run = Singleton.field + }).start + i += 1 + } + } +} |