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Explicitly initialize futex word

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This is mainly to silence valgrind warnings, the actual value
is irrelevant here.
This commit is contained in:
Robin Gareus 2022-11-13 02:45:48 +01:00
parent 949f9e6051
commit 2ae670055d
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1 changed files with 2 additions and 1 deletions
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3
libs/pbd/semutils.cc
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@ -52,6 +52,7 @@ Semaphore::Semaphore (const char* name, int val)
#elif defined USE_FUTEX_SEMAPHORE #elif defined USE_FUTEX_SEMAPHORE
(void)name; /* stop warning */ (void)name; /* stop warning */
_value = val; _value = val;
_futex = 0;
#else #else
(void) name; /* stop gcc warning on !Apple systems */ (void) name; /* stop gcc warning on !Apple systems */
@ -116,7 +117,7 @@ int
Semaphore::wait () Semaphore::wait ()
{ {
if (std::atomic_fetch_sub_explicit (&_value, 1, std::memory_order_relaxed) <= 0) { if (std::atomic_fetch_sub_explicit (&_value, 1, std::memory_order_relaxed) <= 0) {
syscall(SYS_futex, &_futex, FUTEX_WAIT_PRIVATE, _futex, NULL, 0, 0); syscall(SYS_futex, &_futex, FUTEX_WAIT_PRIVATE, _futex, NULL, NULL, 0);
} }
return 0; return 0;
} }