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  → /design/trunk/src/ch_synchronization.xml @ 81

  → /design/trunk/src/ch_synchronization.xml @ 82

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Ignore whitespace Rev 81 → Rev 82

/design/trunk/src/ch_synchronization.xml
2,7 → 2,7
<chapter id="sync">
<?dbhtml filename="sync.html"?>
<title>Mutual exclusion and synchronization</title>
<title>Synchronization</title>
<section>
<title>Introduction</title>
511,7 → 511,7
<para>A futex should be initialized by setting its userspace counter to
one before it is used. When locking the futex via userspace library
function <code>futex_down_timeout</code>, the library code atomically
decrements the futex counter and tests if it droped below zero. If it
decrements the futex counter and tests if it dropped below zero. If it
did, then the futex is locked by another thread and the library uses the
<constant>SYS_FUTEX_SLEEP</constant> syscall to put the thread asleep.
If the counter decreased to 0, then there was no contention and the