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babbea4b30
Add pthread_atfork check to configure.ac and uses it when necessary,
Introduces tls.m4 macro for checking thread-local storage support, Puts
values array into thread-local storage
(lxc_global_config_value@src/lxc/utils.c), Removes
static_lock/static_unlock from LXC code.
Lastly, it introduces a warning for bionic users about multithreaded
usage of LXC.
(requires 64b1be2903 to be reverted first)
Signed-off-by: S.Çağlar Onur <caglar@10ur.org>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>
15 lines
709 B
Plaintext
15 lines
709 B
Plaintext
# See if we have working TLS. We only check to see if it compiles, and that
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# the resulting program actually runs, not whether the resulting TLS variables
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# work properly; that check is done at runtime, since we can run binaries
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# compiled with __thread on systems without TLS.
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AC_DEFUN([LXC_CHECK_TLS],
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[
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AC_MSG_CHECKING(for TLS)
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AC_RUN_IFELSE([AC_LANG_SOURCE([[ static __thread int val; int main() { return 0; } ]])],[have_tls=yes],[have_tls=no],[have_tls=no ])
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AC_MSG_RESULT($have_tls)
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if test "$have_tls" = "yes"; then
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AC_DEFINE([HAVE_TLS],[1],[Define if the compiler supports __thread])
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AC_DEFINE([thread_local],[__thread],[Define to the compiler TLS keyword])
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fi
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])
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