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threads: add a thread_local autoconf check

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Cory Fields 2017-11-27 17:08:27 -05:00 committed by Thomas Snider
parent bba9bd0d9d
commit f7f7e2cd34
2 changed files with 25 additions and 0 deletions
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22
configure.ac
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@ -659,6 +659,28 @@ AC_LINK_IFELSE([AC_LANG_SOURCE([
]
)
TEMP_LDFLAGS="$LDFLAGS"
LDFLAGS="$TEMP_LDFLAGS $PTHREAD_CFLAGS"
AC_MSG_CHECKING([for thread_local support])
AC_LINK_IFELSE([AC_LANG_SOURCE([
#include <thread>
static thread_local int foo = 0;
static void run_thread() { foo++;}
int main(){
for(int i = 0; i < 10; i++) { std::thread(run_thread).detach();}
return foo;
}
])],
[
AC_DEFINE(HAVE_THREAD_LOCAL,1,[Define if thread_local is supported.])
AC_MSG_RESULT(yes)
],
[
AC_MSG_RESULT(no)
]
)
LDFLAGS="$TEMP_LDFLAGS"
# Check for different ways of gathering OS randomness
AC_MSG_CHECKING(for Linux getrandom syscall)
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <unistd.h>

3
src/sync.cpp
View File

@ -11,6 +11,9 @@
#include <stdio.h>
#ifdef DEBUG_LOCKCONTENTION
#if !defined(HAVE_THREAD_LOCAL)
static_assert(false, "thread_local is not supported");
#endif
void PrintLockContention(const char* pszName, const char* pszFile, int nLine)
{
LogPrintf("LOCKCONTENTION: %s\n", pszName);