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ruby_setenv: Do not allow on multi-threaded programs #36

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ruby_setenv: Do not allow on multi-threaded programs #36

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9 changes: 9 additions & 0 deletions hash.c
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Original file line number Diff line number Diff line change
Expand Up @@ -3382,9 +3382,18 @@ check_envname(const char *name)
}
#endif

static void
check_running_threads(void)
{
if (!rb_thread_alone())
rb_raise(rb_eRuntimeError, "cannot setenv() in a multi-threaded program");
}

void
ruby_setenv(const char *name, const char *value)
{
check_running_threads();

#if defined(_WIN32)
# if defined(MINGW_HAS_SECURE_API) || RUBY_MSVCRT_VERSION >= 80
# define HAVE__WPUTENV_S 1
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