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luatz/gettime: Check that CLOCK constants exist
authordaurnimator <quae@daurnimator.com>
Tue, 7 Mar 2017 23:49:28 +0000 (10:49 +1100)
committerdaurnimator <quae@daurnimator.com>
Tue, 7 Mar 2017 23:49:28 +0000 (10:49 +1100)
ljsyscall can end up defining a clock_gettime function without defining clock symbols.
Closes #11

luatz/gettime.lua

index e0da6b4c0f4a95ca647304fc9bb2598653b5859e..b5dec5a5a1ea67c3e25d1e2e6895df65378c8ebe 100644 (file)
@@ -3,7 +3,7 @@ local _M = { }
 _M.source , _M.resolution , _M.gettime = (function()
        local has_syscall , syscall = pcall ( require , "syscall" )
        if has_syscall then
-               if syscall.clock_gettime then
+               if syscall.clock_gettime and syscall.c.CLOCK then
                        local clock_id = syscall.c.CLOCK.REALTIME
                        local function timespec_to_number ( timespec )
                                return tonumber ( timespec.tv_sec ) + tonumber ( timespec.tv_nsec ) * 1e-9