On 16/01/15 18:00 +0100, Torvald Riegel wrote:
+namespace std _GLIBCXX_VISIBILITY(default)
+{
+_GLIBCXX_BEGIN_NAMESPACE_VERSION
+
+ bool
+ __atomic_futex_unsigned_base::_M_futex_wait_until(unsigned *__addr,
+ unsigned __val,
+ bool __has_timeout, chrono::seconds __s, chrono::nanoseconds __ns)
+ {
+ if (!__has_timeout)
+ {
+ // Ignore whether we actually succeeded to block because at worst,
+ // we will fall back to spin-waiting. The only thing we could do
+ // here on errors is abort.
+ int ret __attribute__((unused));
+ ret = syscall (SYS_futex, __addr, futex_wait_op, __val);
+ _GLIBCXX_DEBUG_ASSERT(ret == 0 || errno == EINTR || errno == EAGAIN);
I've just noticed these debug assertions in the futex.cc file, which
will never fire because the library isn't build with -D_GLIBCXX_DEBUG
defined. We should decide whether other errors are necessary to handle
and either throw an exception or std::terminate().
