mirror of
https://github.com/superseriousbusiness/gotosocial.git
synced 2024-11-01 15:00:00 +00:00
ed46224573
* Add SQLite support, fix un-thread-safe DB caches, small performance fixes Signed-off-by: kim (grufwub) <grufwub@gmail.com> * add SQLite licenses to README Signed-off-by: kim (grufwub) <grufwub@gmail.com> * appease the linter, and fix my dumbass-ery Signed-off-by: kim (grufwub) <grufwub@gmail.com> * make requested changes Signed-off-by: kim (grufwub) <grufwub@gmail.com> * add back comment Signed-off-by: kim (grufwub) <grufwub@gmail.com>
50 lines
1.1 KiB
Go
50 lines
1.1 KiB
Go
// Copyright 2017 The Memory 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 memory // import "modernc.org/memory"
|
|
|
|
import (
|
|
"os"
|
|
"syscall"
|
|
)
|
|
|
|
const (
|
|
_MEM_COMMIT = 0x1000
|
|
_MEM_RESERVE = 0x2000
|
|
_MEM_DECOMMIT = 0x4000
|
|
_MEM_RELEASE = 0x8000
|
|
|
|
_PAGE_READWRITE = 0x0004
|
|
_PAGE_NOACCESS = 0x0001
|
|
)
|
|
|
|
const pageSizeLog = 16
|
|
|
|
var (
|
|
modkernel32 = syscall.NewLazyDLL("kernel32.dll")
|
|
osPageMask = osPageSize - 1
|
|
osPageSize = os.Getpagesize()
|
|
procVirtualAlloc = modkernel32.NewProc("VirtualAlloc")
|
|
procVirtualFree = modkernel32.NewProc("VirtualFree")
|
|
)
|
|
|
|
// pageSize aligned.
|
|
func mmap(size int) (uintptr, int, error) {
|
|
size = roundup(size, pageSize)
|
|
addr, _, err := procVirtualAlloc.Call(0, uintptr(size), _MEM_COMMIT|_MEM_RESERVE, _PAGE_READWRITE)
|
|
if err.(syscall.Errno) != 0 || addr == 0 {
|
|
return addr, size, err
|
|
}
|
|
return addr, size, nil
|
|
}
|
|
|
|
func unmap(addr uintptr, size int) error {
|
|
r, _, err := procVirtualFree.Call(addr, 0, _MEM_RELEASE)
|
|
if r == 0 {
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
}
|