syscall: add Windows file mapping functions and constants

R=brainman, rsc1, rsc
CC=golang-dev
https://golang.org/cl/4375046

diff --git a/src/pkg/syscall/syscall_windows.go b/src/pkg/syscall/syscall_windows.go
index 1fbb3ccbf4acef6bb7bfac18500de9e65f91692e..ce1be0021ca2ac4ae912111d7d6139a3bfcc518b 100644 (file)
--- a/src/pkg/syscall/syscall_windows.go
+++ b/src/pkg/syscall/syscall_windows.go
@@ -161,6 +161,12 @@ func NewCallback(fn interface{}) uintptr
 //sys  SetHandleInformation(handle int32, mask uint32, flags uint32) (errno int)
 //sys  FlushFileBuffers(handle int32) (errno int)
 //sys  GetFullPathName(path *uint16, buflen uint32, buf *uint16, fname **uint16) (n uint32, errno int) = kernel32.GetFullPathNameW
+//sys  CreateFileMapping(fhandle int32, sa *SecurityAttributes, prot uint32, maxSizeHigh uint32, maxSizeLow uint32, name *uint16) (handle int32, errno int) = kernel32.CreateFileMappingW
+//sys  MapViewOfFile(handle int32, access uint32, offsetHigh uint32, offsetLow uint32, length uintptr) (addr uintptr, errno int)
+//sys  UnmapViewOfFile(addr uintptr) (errno int)
+//sys  FlushViewOfFile(addr uintptr, length uintptr) (errno int)
+//sys  VirtualLock(addr uintptr, length uintptr) (errno int)
+//sys  VirtualUnlock(addr uintptr, length uintptr) (errno int)
 
 // syscall interface implementation for other packages
 

diff --git a/src/pkg/syscall/zsyscall_windows_386.go b/src/pkg/syscall/zsyscall_windows_386.go
index f4cfdeed8b1d02bd616de9dd6b6584f760545d70..ce36ab6c0fa9741aac92855ea92aae86c658165a 100644 (file)
--- a/src/pkg/syscall/zsyscall_windows_386.go
+++ b/src/pkg/syscall/zsyscall_windows_386.go
@@ -70,6 +70,12 @@ var (
        procSetHandleInformation       = getSysProcAddr(modkernel32, "SetHandleInformation")
        procFlushFileBuffers           = getSysProcAddr(modkernel32, "FlushFileBuffers")
        procGetFullPathNameW           = getSysProcAddr(modkernel32, "GetFullPathNameW")
+       procCreateFileMappingW         = getSysProcAddr(modkernel32, "CreateFileMappingW")
+       procMapViewOfFile              = getSysProcAddr(modkernel32, "MapViewOfFile")
+       procUnmapViewOfFile            = getSysProcAddr(modkernel32, "UnmapViewOfFile")
+       procFlushViewOfFile            = getSysProcAddr(modkernel32, "FlushViewOfFile")
+       procVirtualLock                = getSysProcAddr(modkernel32, "VirtualLock")
+       procVirtualUnlock              = getSysProcAddr(modkernel32, "VirtualUnlock")
        procWSAStartup                 = getSysProcAddr(modwsock32, "WSAStartup")
        procWSACleanup                 = getSysProcAddr(modwsock32, "WSACleanup")
        procsocket                     = getSysProcAddr(modwsock32, "socket")
@@ -901,6 +907,92 @@ func GetFullPathName(path *uint16, buflen uint32, buf *uint16, fname **uint16) (
        return
 }
 
+func CreateFileMapping(fhandle int32, sa *SecurityAttributes, prot uint32, maxSizeHigh uint32, maxSizeLow uint32, name *uint16) (handle int32, errno int) {
+       r0, _, e1 := Syscall6(procCreateFileMappingW, 6, uintptr(fhandle), uintptr(unsafe.Pointer(sa)), uintptr(prot), uintptr(maxSizeHigh), uintptr(maxSizeLow), uintptr(unsafe.Pointer(name)))
+       handle = int32(r0)
+       if handle == 0 {
+               if e1 != 0 {
+                       errno = int(e1)
+               } else {
+                       errno = EINVAL
+               }
+       } else {
+               errno = 0
+       }
+       return
+}
+
+func MapViewOfFile(handle int32, access uint32, offsetHigh uint32, offsetLow uint32, length uintptr) (addr uintptr, errno int) {
+       r0, _, e1 := Syscall6(procMapViewOfFile, 5, uintptr(handle), uintptr(access), uintptr(offsetHigh), uintptr(offsetLow), uintptr(length), 0)
+       addr = uintptr(r0)
+       if addr == 0 {
+               if e1 != 0 {
+                       errno = int(e1)
+               } else {
+                       errno = EINVAL
+               }
+       } else {
+               errno = 0
+       }
+       return
+}
+
+func UnmapViewOfFile(addr uintptr) (errno int) {
+       r1, _, e1 := Syscall(procUnmapViewOfFile, 1, uintptr(addr), 0, 0)
+       if int(r1) == 0 {
+               if e1 != 0 {
+                       errno = int(e1)
+               } else {
+                       errno = EINVAL
+               }
+       } else {
+               errno = 0
+       }
+       return
+}
+
+func FlushViewOfFile(addr uintptr, length uintptr) (errno int) {
+       r1, _, e1 := Syscall(procFlushViewOfFile, 2, uintptr(addr), uintptr(length), 0)
+       if int(r1) == 0 {
+               if e1 != 0 {
+                       errno = int(e1)
+               } else {
+                       errno = EINVAL
+               }
+       } else {
+               errno = 0
+       }
+       return
+}
+
+func VirtualLock(addr uintptr, length uintptr) (errno int) {
+       r1, _, e1 := Syscall(procVirtualLock, 2, uintptr(addr), uintptr(length), 0)
+       if int(r1) == 0 {
+               if e1 != 0 {
+                       errno = int(e1)
+               } else {
+                       errno = EINVAL
+               }
+       } else {
+               errno = 0
+       }
+       return
+}
+
+func VirtualUnlock(addr uintptr, length uintptr) (errno int) {
+       r1, _, e1 := Syscall(procVirtualUnlock, 2, uintptr(addr), uintptr(length), 0)
+       if int(r1) == 0 {
+               if e1 != 0 {
+                       errno = int(e1)
+               } else {
+                       errno = EINVAL
+               }
+       } else {
+               errno = 0
+       }
+       return
+}
+
 func WSAStartup(verreq uint32, data *WSAData) (sockerrno int) {
        r0, _, _ := Syscall(procWSAStartup, 2, uintptr(verreq), uintptr(unsafe.Pointer(data)), 0)
        sockerrno = int(r0)

diff --git a/src/pkg/syscall/ztypes_windows_386.go b/src/pkg/syscall/ztypes_windows_386.go
index 3a50be14c367b1450c2a1316c2604efcb2084806..73cfe069bc2b06ec5b49031dfb9a4a662fe1ebee 100644 (file)
--- a/src/pkg/syscall/ztypes_windows_386.go
+++ b/src/pkg/syscall/ztypes_windows_386.go
@@ -119,6 +119,18 @@ const (
        STANDARD_RIGHTS_READ      = 0x00020000
        PROCESS_QUERY_INFORMATION = 0x00000400
        SYNCHRONIZE               = 0x00100000
+
+       PAGE_READONLY          = 0x02
+       PAGE_READWRITE         = 0x04
+       PAGE_WRITECOPY         = 0x08
+       PAGE_EXECUTE_READ      = 0x20
+       PAGE_EXECUTE_READWRITE = 0x40
+       PAGE_EXECUTE_WRITECOPY = 0x80
+
+       FILE_MAP_COPY    = 0x01
+       FILE_MAP_WRITE   = 0x02
+       FILE_MAP_READ    = 0x04
+       FILE_MAP_EXECUTE = 0x20
 )
 
 const (