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authorMistivia <i@mistivia.com>2025-11-02 15:27:18 +0800
committerMistivia <i@mistivia.com>2025-11-02 15:27:18 +0800
commite9c24f4af7ed56760f6db7941827d09f6db9020b (patch)
tree62128c43b883ce5e3148113350978755779bb5de /teleirc/matterbridge/vendor/modernc.org/libc/ioutil_freebsd.go
parent58d5e7cfda4781d8a57ec52aefd02983835c301a (diff)
add matterbridge
Diffstat (limited to 'teleirc/matterbridge/vendor/modernc.org/libc/ioutil_freebsd.go')
-rw-r--r--teleirc/matterbridge/vendor/modernc.org/libc/ioutil_freebsd.go65
1 files changed, 65 insertions, 0 deletions
diff --git a/teleirc/matterbridge/vendor/modernc.org/libc/ioutil_freebsd.go b/teleirc/matterbridge/vendor/modernc.org/libc/ioutil_freebsd.go
new file mode 100644
index 0000000..40ca5ed
--- /dev/null
+++ b/teleirc/matterbridge/vendor/modernc.org/libc/ioutil_freebsd.go
@@ -0,0 +1,65 @@
+// Copyright 2010 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE-GO file.
+
+// Modifications Copyright 2020 The Libc Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package libc // import "modernc.org/libc"
+
+import (
+ "fmt"
+ "os"
+ "sync"
+ "time"
+ "unsafe"
+
+ "golang.org/x/sys/unix"
+)
+
+// Random number state.
+// We generate random temporary file names so that there's a good
+// chance the file doesn't exist yet - keeps the number of tries in
+// TempFile to a minimum.
+var randState uint32
+var randStateMu sync.Mutex
+
+func reseed() uint32 {
+ return uint32(time.Now().UnixNano() + int64(os.Getpid()))
+}
+
+func nextRandom(x uintptr) {
+ randStateMu.Lock()
+ r := randState
+ if r == 0 {
+ r = reseed()
+ }
+ r = r*1664525 + 1013904223 // constants from Numerical Recipes
+ randState = r
+ randStateMu.Unlock()
+ copy((*RawMem)(unsafe.Pointer(x))[:6:6], fmt.Sprintf("%06d", int(1e9+r%1e9)%1e6))
+}
+
+func tempFile(s, x uintptr, _ int32) (fd int, err error) {
+ const maxTry = 10000
+ nconflict := 0
+ for i := 0; i < maxTry; i++ {
+ nextRandom(x)
+ if fd, err = unix.Open(GoString(s), os.O_RDWR|os.O_CREATE|os.O_EXCL, 0600); err == nil {
+ return fd, nil
+ }
+
+ if !os.IsExist(err) {
+ return -1, err
+ }
+
+ if nconflict++; nconflict > 10 {
+ randStateMu.Lock()
+ randState = reseed()
+ nconflict = 0
+ randStateMu.Unlock()
+ }
+ }
+ return -1, err
+}