mirror of
https://github.com/featurebasedb/featurebase.git
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4c53f86e82
i used this script, a little clunky but it got the job done
```bash
for file in `find . -type f -print | grep '\.go'`; do
sed '1,/^\/\/ limitations under the License.$/d' $file > $file.tmp;
result=`cat $file.tmp`
if [[ result != "" ]]; then
gofmt $file.tmp &> /dev/null;
if [[ $? == 0 ]]; then
mv $file.tmp $file && gofmt -w $file;
else
rm $file.tmp;
fi
else
rm $file.tmp;
fi
done
```
43 lines
1.2 KiB
Go
43 lines
1.2 KiB
Go
package syswrap
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import (
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"os"
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"sync"
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"sync/atomic"
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)
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var fileCount uint64
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// maxFileCount is the soft limit on the number of open files. syswrap.OpenFile
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// will warn when this limit is passed.
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var maxFileCount uint64 = 500000
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var fileMu sync.RWMutex
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func SetMaxFileCount(max uint64) uint64 {
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fileMu.Lock()
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prev := maxFileCount
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maxFileCount = max
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fileMu.Unlock()
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return prev
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}
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// OpenFile passes the arguments along to os.OpenFile while incrementing a
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// counter. If the counter is above the maximum, it returns mustClose true to
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// signal the calling function that it should not keep the file open
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// indefinitely. Files opened with this function should be closed by
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// syswrap.CloseFile.
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func OpenFile(name string, flag int, perm os.FileMode) (file *os.File, mustClose bool, err error) {
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file, err = os.OpenFile(name, flag, perm)
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fileMu.RLock()
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defer fileMu.RUnlock()
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if newCount := atomic.AddUint64(&fileCount, 1); newCount > maxFileCount {
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mustClose = true
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}
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return file, mustClose, err
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}
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// CloseFile decrements the global count of open files and closes the file.
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func CloseFile(f *os.File) error {
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atomic.AddUint64(&fileCount, ^uint64(0)) // decrement
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return f.Close()
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}
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