diff options
Diffstat (limited to 'vendor/modernc.org/memory/mmap_unix.go')
| -rw-r--r-- | vendor/modernc.org/memory/mmap_unix.go | 22 |
1 files changed, 6 insertions, 16 deletions
diff --git a/vendor/modernc.org/memory/mmap_unix.go b/vendor/modernc.org/memory/mmap_unix.go index de57b8823..ef6c9a539 100644 --- a/vendor/modernc.org/memory/mmap_unix.go +++ b/vendor/modernc.org/memory/mmap_unix.go @@ -2,16 +2,16 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE-MMAP-GO file. -//go:build darwin || dragonfly || freebsd || linux || (solaris && !illumos) || netbsd -// +build darwin dragonfly freebsd linux solaris,!illumos netbsd +//go:build unix // Modifications (c) 2017 The Memory Authors. package memory // import "modernc.org/memory" import ( + "golang.org/x/sys/unix" "os" - "syscall" + "unsafe" ) const pageSizeLog = 20 @@ -22,28 +22,18 @@ var ( ) func unmap(addr uintptr, size int) error { - _, _, errno := syscall.Syscall(syscall.SYS_MUNMAP, addr, uintptr(size), 0) - if errno != 0 { - return errno - } - - return nil + return unix.MunmapPtr(unsafe.Pointer(addr), uintptr(size)) } // pageSize aligned. func mmap(size int) (uintptr, int, error) { size = roundup(size, osPageSize) - - // The actual mmap syscall varies by architecture. mmapSyscall provides same - // functionality as the unexported funtion syscall.mmap and is declared in - // mmap_*_*.go and mmap_fallback.go. To add support for a new architecture, - // check function mmap in src/syscall/syscall_*_*.go or - // src/syscall/zsyscall_*_*.go in Go's source code. - p, err := mmapSyscall(0, uintptr(size+pageSize), syscall.PROT_READ|syscall.PROT_WRITE, syscall.MAP_PRIVATE|syscall.MAP_ANON, -1, 0) + up, err := unix.MmapPtr(-1, 0, nil, uintptr(size+pageSize), unix.PROT_READ|unix.PROT_WRITE, unix.MAP_PRIVATE|unix.MAP_ANON) if err != nil { return 0, 0, err } + p := uintptr(up) n := size + pageSize if p&uintptr(osPageMask) != 0 { panic("internal error") |