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Do not enable lazy locking by default.

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Do not enable lazy locking by default, because:
- It's fragile (applications can subvert detection of multi-threaded
  mode).
- Thread caching amortizes locking overhead in the default
  configuration.
This commit is contained in:
Jason Evans
2012-02-13 12:36:11 -08:00
parent 6ffbbeb5d6
commit 0fee70d718
2 changed files with 6 additions and 6 deletions
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8
configure.ac
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@@ -730,17 +730,17 @@ AC_CHECK_LIB([pthread], [pthread_create], [LIBS="$LIBS -lpthread"],
CPPFLAGS="$CPPFLAGS -D_REENTRANT"
dnl Enable lazy locking by default.
dnl Disable lazy locking by default.
AC_ARG_ENABLE([lazy_lock],
[AS_HELP_STRING([--disable-lazy-lock],
[Disable lazy locking (always lock, even when single-threaded)])],
[AS_HELP_STRING([--enable-lazy-lock],
[Enable lazy locking (only lock when multi-threaded)])],
[if test "x$enable_lazy_lock" = "xno" ; then
enable_lazy_lock="0"
else
enable_lazy_lock="1"
fi
],
[enable_lazy_lock="1"]
[enable_lazy_lock="0"]
)
if test "x$enable_lazy_lock" = "x1" ; then
AC_CHECK_HEADERS([dlfcn.h], , [AC_MSG_ERROR([dlfcn.h is missing])])