Caleb Gardner
17d45eea50
Added FastOptions as an alternative to DefaultOptions A few performance improvements A few bug fixes
50 lines
1.6 KiB
Go
50 lines
1.6 KiB
Go
package squashfs
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import (
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"io"
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"io/fs"
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"runtime"
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"github.com/CalebQ42/squashfs/internal/routinemanager"
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)
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type ExtractionOptions struct {
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manager *routinemanager.Manager
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LogOutput io.Writer //Where the verbose log should write.
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DereferenceSymlink bool //Replace symlinks with the target file.
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UnbreakSymlink bool //Try to make sure symlinks remain unbroken when extracted, without changing the symlink.
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Verbose bool //Prints extra info to log on an error.
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IgnorePerm bool //Ignore file's permissions and instead use Perm.
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Perm fs.FileMode //Permission to use when IgnorePerm. Defaults to 0777.
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SimultaneousFiles uint16 //Number of files to process in parallel. Default set based on runtime.NumCPU().
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ExtractionRoutines uint16 //Number of goroutines to use for each file's extraction. Only applies to regular files. Default set based on runtime.NumCPU().
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}
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// The default extraction options.
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func DefaultOptions() *ExtractionOptions {
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cores := uint16(runtime.NumCPU() / 2)
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var files, routines uint16
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if cores <= 4 {
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files = 1
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routines = cores
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} else {
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files = cores - 4
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routines = 4
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}
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return &ExtractionOptions{
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Perm: 0777,
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SimultaneousFiles: files,
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ExtractionRoutines: routines,
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}
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}
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// Less limited default options. Can run up 2x faster than DefaultOptions.
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// Tends to use all available CPU resources.
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func FastOptions() *ExtractionOptions {
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return &ExtractionOptions{
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Perm: 0777,
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SimultaneousFiles: uint16(runtime.NumCPU()),
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ExtractionRoutines: uint16(runtime.NumCPU()),
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}
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}
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