golang.org/toolchain@v0.0.1-go1.9rc2.windows-amd64/src/cmd/vendor/github.com/google/pprof/internal/driver/tempfile.go (about)

     1  // Copyright 2014 Google Inc. All Rights Reserved.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package driver
    16  
    17  import (
    18  	"fmt"
    19  	"os"
    20  	"path/filepath"
    21  	"sync"
    22  )
    23  
    24  // newTempFile returns a new output file in dir with the provided prefix and suffix.
    25  func newTempFile(dir, prefix, suffix string) (*os.File, error) {
    26  	for index := 1; index < 10000; index++ {
    27  		path := filepath.Join(dir, fmt.Sprintf("%s%03d%s", prefix, index, suffix))
    28  		if _, err := os.Stat(path); err != nil {
    29  			return os.Create(path)
    30  		}
    31  	}
    32  	// Give up
    33  	return nil, fmt.Errorf("could not create file of the form %s%03d%s", prefix, 1, suffix)
    34  }
    35  
    36  var tempFiles []string
    37  var tempFilesMu = sync.Mutex{}
    38  
    39  // deferDeleteTempFile marks a file to be deleted by next call to Cleanup()
    40  func deferDeleteTempFile(path string) {
    41  	tempFilesMu.Lock()
    42  	tempFiles = append(tempFiles, path)
    43  	tempFilesMu.Unlock()
    44  }
    45  
    46  // cleanupTempFiles removes any temporary files selected for deferred cleaning.
    47  func cleanupTempFiles() {
    48  	tempFilesMu.Lock()
    49  	for _, f := range tempFiles {
    50  		os.Remove(f)
    51  	}
    52  	tempFiles = nil
    53  	tempFilesMu.Unlock()
    54  }