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Make os2.File a more generic interface

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This commit is contained in:
gingerBill
2024-07-14 15:09:33 +01:00
parent 3d38f14202
commit 4f73b35da5
5 changed files with 103 additions and 74 deletions
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core/os/os2/file_linux.odin
+55 -38
View File
@@ -7,13 +7,14 @@ import "base:runtime"
import "core:sys/linux"
_File :: struct {
using file: File,
name: string,
fd: linux.Fd,
allocator: runtime.Allocator,
}
_stdin : File = {
impl = {
_stdin := File{
impl = &_File{
name = "/proc/self/fd/0",
fd = 0,
allocator = _file_allocator(),
@@ -21,9 +22,10 @@ _stdin : File = {
stream = {
procedure = _file_stream_proc,
},
fstat = _fstat,
}
_stdout : File = {
impl = {
_stdout := File{
impl = &_File{
name = "/proc/self/fd/1",
fd = 1,
allocator = _file_allocator(),
@@ -31,9 +33,10 @@ _stdout : File = {
stream = {
procedure = _file_stream_proc,
},
fstat = _fstat,
}
_stderr : File = {
impl = {
_stderr := File{
impl = &_File{
name = "/proc/self/fd/2",
fd = 2,
allocator = _file_allocator(),
@@ -41,6 +44,7 @@ _stderr : File = {
stream = {
procedure = _file_stream_proc,
},
fstat = _fstat,
}
@init
@@ -89,35 +93,35 @@ _open :: proc(name: string, flags: File_Flags, perm: File_Mode) -> (f: ^File, er
}
_new_file :: proc(fd: uintptr, _: string = "") -> ^File {
file := new(File, file_allocator())
file.impl = {
fd = linux.Fd(fd),
allocator = file_allocator(),
name = _get_full_path(file.impl.fd, file.impl.allocator),
}
file.stream = {
data = file,
impl := new(_File, file_allocator())
impl.fd = linux.Fd(fd)
impl.allocator = file_allocator()
impl.name = _get_full_path(impl.fd, impl.allocator)
impl.file.stream = {
data = &impl.file,
procedure = _file_stream_proc,
}
file.fstat = _fstat
return file
impl.fstat = _fstat
return impl
}
_destroy :: proc(f: ^File) -> Error {
if f == nil {
if f == nil || f.impl == nil {
return nil
}
delete(f.impl.name, f.impl.allocator)
free(f, f.impl.allocator)
impl := (^_File)(f.impl)
delete(impl.name, impl.allocator)
free(f, impl.allocator)
return nil
}
_close :: proc(f: ^File) -> Error {
if f == nil {
if f == nil || f.impl == nil {
return nil
}
errno := linux.close(f.impl.fd)
impl := (^_File)(f.impl)
errno := linux.close(impl.fd)
if errno == .EBADF { // avoid possible double free
return _get_platform_error(errno)
}
@@ -126,18 +130,20 @@ _close :: proc(f: ^File) -> Error {
}
_fd :: proc(f: ^File) -> uintptr {
if f == nil {
if f == nil || f.impl == nil {
return ~uintptr(0)
}
return uintptr(f.impl.fd)
impl := (^_File)(f.impl)
return uintptr(impl.fd)
}
_name :: proc(f: ^File) -> string {
return f.impl.name if f != nil else ""
return (^_File)(f.impl).name if f != nil && f.impl != nil else ""
}
_seek :: proc(f: ^File, offset: i64, whence: io.Seek_From) -> (ret: i64, err: Error) {
n, errno := linux.lseek(f.impl.fd, offset, linux.Seek_Whence(whence))
impl := (^_File)(f.impl)
n, errno := linux.lseek(impl.fd, offset, linux.Seek_Whence(whence))
if errno != .NONE {
return -1, _get_platform_error(errno)
}
@@ -148,7 +154,8 @@ _read :: proc(f: ^File, p: []byte) -> (i64, Error) {
if len(p) == 0 {
return 0, nil
}
n, errno := linux.read(f.impl.fd, p[:])
impl := (^_File)(f.impl)
n, errno := linux.read(impl.fd, p[:])
if errno != .NONE {
return -1, _get_platform_error(errno)
}
@@ -159,8 +166,8 @@ _read_at :: proc(f: ^File, p: []byte, offset: i64) -> (i64, Error) {
if offset < 0 {
return 0, .Invalid_Offset
}
n, errno := linux.pread(f.impl.fd, p[:], offset)
impl := (^_File)(f.impl)
n, errno := linux.pread(impl.fd, p[:], offset)
if errno != .NONE {
return -1, _get_platform_error(errno)
}
@@ -174,7 +181,8 @@ _write :: proc(f: ^File, p: []byte) -> (i64, Error) {
if len(p) == 0 {
return 0, nil
}
n, errno := linux.write(f.impl.fd, p[:])
impl := (^_File)(f.impl)
n, errno := linux.write(impl.fd, p[:])
if errno != .NONE {
return -1, _get_platform_error(errno)
}
@@ -186,7 +194,8 @@ _write_at :: proc(f: ^File, p: []byte, offset: i64) -> (i64, Error) {
return 0, .Invalid_Offset
}
n, errno := linux.pwrite(f.impl.fd, p[:], offset)
impl := (^_File)(f.impl)
n, errno := linux.pwrite(impl.fd, p[:], offset)
if errno != .NONE {
return -1, _get_platform_error(errno)
}
@@ -195,7 +204,8 @@ _write_at :: proc(f: ^File, p: []byte, offset: i64) -> (i64, Error) {
_file_size :: proc(f: ^File) -> (n: i64, err: Error) {
s: linux.Stat = ---
errno := linux.fstat(f.impl.fd, &s)
impl := (^_File)(f.impl)
errno := linux.fstat(impl.fd, &s)
if errno != .NONE {
return -1, _get_platform_error(errno)
}
@@ -203,15 +213,18 @@ _file_size :: proc(f: ^File) -> (n: i64, err: Error) {
}
_sync :: proc(f: ^File) -> Error {
return _get_platform_error(linux.fsync(f.impl.fd))
impl := (^_File)(f.impl)
return _get_platform_error(linux.fsync(impl.fd))
}
_flush :: proc(f: ^File) -> Error {
return _get_platform_error(linux.fsync(f.impl.fd))
impl := (^_File)(f.impl)
return _get_platform_error(linux.fsync(impl.fd))
}
_truncate :: proc(f: ^File, size: i64) -> Error {
return _get_platform_error(linux.ftruncate(f.impl.fd, size))
impl := (^_File)(f.impl)
return _get_platform_error(linux.ftruncate(impl.fd, size))
}
_remove :: proc(name: string) -> Error {
@@ -287,7 +300,8 @@ _chdir :: proc(name: string) -> Error {
}
_fchdir :: proc(f: ^File) -> Error {
return _get_platform_error(linux.fchdir(f.impl.fd))
impl := (^_File)(f.impl)
return _get_platform_error(linux.fchdir(impl.fd))
}
_chmod :: proc(name: string, mode: File_Mode) -> Error {
@@ -297,7 +311,8 @@ _chmod :: proc(name: string, mode: File_Mode) -> Error {
}
_fchmod :: proc(f: ^File, mode: File_Mode) -> Error {
return _get_platform_error(linux.fchmod(f.impl.fd, transmute(linux.Mode)(u32(mode))))
impl := (^_File)(f.impl)
return _get_platform_error(linux.fchmod(impl.fd, transmute(linux.Mode)(u32(mode))))
}
// NOTE: will throw error without super user priviledges
@@ -316,7 +331,8 @@ _lchown :: proc(name: string, uid, gid: int) -> Error {
// NOTE: will throw error without super user priviledges
_fchown :: proc(f: ^File, uid, gid: int) -> Error {
return _get_platform_error(linux.fchown(f.impl.fd, linux.Uid(uid), linux.Gid(gid)))
impl := (^_File)(f.impl)
return _get_platform_error(linux.fchown(impl.fd, linux.Uid(uid), linux.Gid(gid)))
}
_chtimes :: proc(name: string, atime, mtime: time.Time) -> Error {
@@ -346,7 +362,8 @@ _fchtimes :: proc(f: ^File, atime, mtime: time.Time) -> Error {
uint(mtime._nsec) % uint(time.Second),
},
}
return _get_platform_error(linux.utimensat(f.impl.fd, nil, &times[0], nil))
impl := (^_File)(f.impl)
return _get_platform_error(linux.utimensat(impl.fd, nil, &times[0], nil))
}
_exists :: proc(name: string) -> bool {