3b32c2028b
This adds the experimental support of the file system compilation cache. Notably, experimental.WithCompilationCacheDirName allows users to configure where the compiler writes the cache into. Versioning/validation of binary compatibility has been done via the release tag (which will be created from the end of this month). More specifically, the cache file starts with a header with the hardcoded wazero version. Fixes #618 Signed-off-by: Takeshi Yoneda <takeshi@tetrate.io> Co-authored-by: Crypt Keeper <64215+codefromthecrypt@users.noreply.github.com>
21 lines
621 B
Go
21 lines
621 B
Go
package platform
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// bufWriter implements io.Writer.
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//
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// This is implemented because bytes.Buffer cannot write from the beginning of the underlying buffer
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// without changing the memory location. In this case, the underlying buffer is memory-mapped region,
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// and we have to write into that region via io.Copy since sometimes the original native code exists
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// as a file for external-cached cases.
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type bufWriter struct {
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underlying []byte
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pos int
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}
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// Write implements io.Writer Write.
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func (b *bufWriter) Write(p []byte) (n int, err error) {
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copy(b.underlying[b.pos:], p)
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n = len(p)
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b.pos += n
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return
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}
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