remove cgo#5
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Go can call POSIX API without using cgo.
| "os" | ||
| "unsafe" | ||
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| "golang.org/x/sys/unix" |
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Put this into glide.yaml and glide.lock.
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I added glide.yaml and glide.lock
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@catatsuy Fix compilation error. |
cachectl/stat.go
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| pagesActive := activePages(fpath) | ||
| pagesActive, err := activePages(fpath) | ||
| if err != nil { | ||
| log.Fatalf("%v\n", err) |
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Use log.Printf() instead of log.Fatalf().
cachectl/activepages.go
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| if ret != 0 { | ||
| return 0, err | ||
| } | ||
| defer unix.Munmap(mmap) |
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Should munmap-call move to line after unix.Mmap()?
cachectl/activepages.go
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| result := 0 | ||
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| for _, p := range pageinfo { | ||
| if p%2 == 1 { |
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The original C code is it. But I thought that this one was easier to understand.
I thought that it should be left to the optimization of the compiler, but should it match the original C code?
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Original code looks easier to understand. Because each entry of pageinfo is assumed that it is checked by the least significant bit. So using bit manipulation is more clear.
According to man mincore,
On return, the least significant bit of each byte will be set if the corresponding page is currently resident in memory, and be clear otherwise. (The settings of the other bits in each byte are undefined; these bits are reserved for possible later use.)
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Go can call POSIX API without using cgo.