zig

commit ae604b446488e2b0931e84c796819d3f817fa66f (tree)
parent a712a5515d2d7a418d77bc419e4fc0a7fe5639f5
Author: daurnimator <quae@daurnimator.com>
Date:   Mon, 20 May 2019 23:25:11 +1000

std: add linux kernel_rwf type and preadv2+pwritev2

Diffstat:
M
std/os/bits/linux.zig
 | 
17
+++++++++++++++++
M
std/os/linux.zig
 | 
8
++++++++

2 files changed, 25 insertions(+), 0 deletions(-)
diff --git a/std/os/bits/linux.zig b/std/os/bits/linux.zig
@@ -119,6 +119,23 @@ pub const O_RDONLY = 0o0;
 pub const O_WRONLY = 0o1;
 pub const O_RDWR = 0o2;
 
+pub const kernel_rwf = u32;
+
+/// high priority request, poll if possible
+pub const RWF_HIPRI = kernel_rwf(0x00000001);
+
+/// per-IO O_DSYNC
+pub const RWF_DSYNC = kernel_rwf(0x00000002);
+
+/// per-IO O_SYNC
+pub const RWF_SYNC = kernel_rwf(0x00000004);
+
+/// per-IO, return -EAGAIN if operation would block
+pub const RWF_NOWAIT = kernel_rwf(0x00000008);
+
+/// per-IO O_APPEND
+pub const RWF_APPEND = kernel_rwf(0x00000010);
+
 pub const SEEK_SET = 0;
 pub const SEEK_CUR = 1;
 pub const SEEK_END = 2;
diff --git a/std/os/linux.zig b/std/os/linux.zig
@@ -189,6 +189,10 @@ pub fn preadv(fd: i32, iov: [*]const iovec, count: usize, offset: u64) usize {
     return syscall4(SYS_preadv, @bitCast(usize, isize(fd)), @ptrToInt(iov), count, offset);
 }
 
+pub fn preadv2(fd: i32, iov: [*]const iovec, count: usize, offset: u64, flags: kernel_rwf) usize {
+    return syscall5(SYS_preadv2, @bitCast(usize, isize(fd)), @ptrToInt(iov), count, offset, flags);
+}
+
 pub fn readv(fd: i32, iov: [*]const iovec, count: usize) usize {
     return syscall3(SYS_readv, @bitCast(usize, isize(fd)), @ptrToInt(iov), count);
 }
@@ -201,6 +205,10 @@ pub fn pwritev(fd: i32, iov: [*]const iovec_const, count: usize, offset: u64) us
     return syscall4(SYS_pwritev, @bitCast(usize, isize(fd)), @ptrToInt(iov), count, offset);
 }
 
+pub fn pwritev2(fd: i32, iov: [*]const iovec_const, count: usize, offset: u64, flags: kernel_rwf) usize {
+    return syscall5(SYS_pwritev2, @bitCast(usize, isize(fd)), @ptrToInt(iov), count, offset, flags);
+}
+
 // TODO https://github.com/ziglang/zig/issues/265
 pub fn rmdir(path: [*]const u8) usize {
     if (@hasDecl(@This(), "SYS_rmdir")) {