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Diffstat (limited to 'vendor/github.com/bytedance/gopkg/lang/dirtmake/bytes.go')
-rw-r--r--vendor/github.com/bytedance/gopkg/lang/dirtmake/bytes.go43
1 files changed, 43 insertions, 0 deletions
diff --git a/vendor/github.com/bytedance/gopkg/lang/dirtmake/bytes.go b/vendor/github.com/bytedance/gopkg/lang/dirtmake/bytes.go
new file mode 100644
index 000000000..1daa27904
--- /dev/null
+++ b/vendor/github.com/bytedance/gopkg/lang/dirtmake/bytes.go
@@ -0,0 +1,43 @@
+// Copyright 2024 ByteDance Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package dirtmake
+
+import (
+ "unsafe"
+)
+
+type slice struct {
+ data unsafe.Pointer
+ len int
+ cap int
+}
+
+//go:linkname mallocgc runtime.mallocgc
+func mallocgc(size uintptr, typ unsafe.Pointer, needzero bool) unsafe.Pointer
+
+// Bytes allocates a byte slice but does not clean up the memory it references.
+// Throw a fatal error instead of panic if cap is greater than runtime.maxAlloc.
+// NOTE: MUST set any byte element before it's read.
+func Bytes(len, cap int) (b []byte) {
+ if len < 0 || len > cap {
+ panic("dirtmake.Bytes: len out of range")
+ }
+ p := mallocgc(uintptr(cap), nil, false)
+ sh := (*slice)(unsafe.Pointer(&b))
+ sh.data = p
+ sh.len = len
+ sh.cap = cap
+ return
+}