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cmFileTimeComparison: Port to OS X nanosecond times (#15769)

This commit is contained in:
Brad King 2015-10-08 13:37:37 -04:00
parent 0faccb839a
commit 8d27b40778
2 changed files with 36 additions and 0 deletions
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1
Source/CMakeLists.txt
View File

@ -550,6 +550,7 @@ endforeach()
foreach(check
STAT_HAS_ST_MTIM
STAT_HAS_ST_MTIMESPEC
)
if(KWSYS_CXX_${check}_COMPILED) # abuse KWSys check cache entry
set(CMake_${check} 1)

35
Source/cmFileTimeComparison.cxx
View File

@ -166,6 +166,24 @@ int cmFileTimeComparisonInternal::Compare(cmFileTimeComparison_Type* s1,
{
return 1;
}
# elif CMake_STAT_HAS_ST_MTIMESPEC
// Compare using nanosecond resolution.
if(s1->st_mtimespec.tv_sec < s2->st_mtimespec.tv_sec)
{
return -1;
}
else if(s1->st_mtimespec.tv_sec > s2->st_mtimespec.tv_sec)
{
return 1;
}
else if(s1->st_mtimespec.tv_nsec < s2->st_mtimespec.tv_nsec)
{
return -1;
}
else if(s1->st_mtimespec.tv_nsec > s2->st_mtimespec.tv_nsec)
{
return 1;
}
# else
// Compare using 1 second resolution.
if(s1->st_mtime < s2->st_mtime)
@ -207,6 +225,23 @@ bool cmFileTimeComparisonInternal::TimesDiffer(cmFileTimeComparison_Type* s1,
{
return false;
}
# elif CMake_STAT_HAS_ST_MTIMESPEC
// Times are integers in units of 1ns.
long long bil = 1000000000;
long long t1 = s1->st_mtimespec.tv_sec * bil + s1->st_mtimespec.tv_nsec;
long long t2 = s2->st_mtimespec.tv_sec * bil + s2->st_mtimespec.tv_nsec;
if(t1 < t2)
{
return (t2 - t1) >= bil;
}
else if(t2 < t1)
{
return (t1 - t2) >= bil;
}
else
{
return false;
}
# else
// Times are integers in units of 1s.
if(s1->st_mtime < s2->st_mtime)