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Pass up to 5 arguments in Zen IPC

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This commit is contained in:
Andrea Orru 2018-04-12 22:24:57 -07:00
parent 70f2bb03fd
commit c5f088e52c
1 changed files with 26 additions and 21 deletions
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47
std/os/zen.zig
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@ -1,3 +1,6 @@
const std = @import("../index.zig");
const assert = std.debug.assert;
//////////////////////////
//// IPC structures ////
//////////////////////////
@ -5,28 +8,36 @@
pub const Message = struct {
sender: MailboxId,
receiver: MailboxId,
type: usize,
payload: usize,
buffer: ?[]const u8,
code: usize,
args: [5]usize,
payload: ?[]const u8,
pub fn from(mailbox_id: &const MailboxId) Message {
return Message {
.sender = MailboxId.Undefined,
.receiver = *mailbox_id,
.type = 0,
.payload = 0,
.buffer = null,
.code = undefined,
.args = undefined,
.payload = null,
};
}
pub fn to(mailbox_id: &const MailboxId, msg_type: usize) Message {
return Message {
pub fn to(mailbox_id: &const MailboxId, msg_code: usize, args: ...) Message {
var message = Message {
.sender = MailboxId.This,
.receiver = *mailbox_id,
.type = msg_type,
.payload = 0,
.buffer = null,
.code = msg_code,
.args = undefined,
.payload = null,
};
assert (args.len <= message.args.len);
comptime var i = 0;
inline while (i < args.len) : (i += 1) {
message.args[i] = args[i];
}
return message;
}
pub fn as(self: &const Message, sender: &const MailboxId) Message {
@ -35,15 +46,9 @@ pub const Message = struct {
return message;
}
pub fn data(self: &const Message, var_data: var) Message {
pub fn withPayload(self: &const Message, payload: []const u8) Message {
var message = *self;
if (@canImplicitCast([]const u8, var_data)) {
message.buffer = var_data;
} else {
message.payload = var_data;
}
message.payload = payload;
return message;
}
};
@ -91,7 +96,7 @@ pub fn read(fd: i32, buf: &u8, count: usize) usize {
var message = Message.from(MailboxId.This);
receive(&message);
buf[i] = u8(message.payload);
buf[i] = u8(message.args[0]);
}
},
else => unreachable,
@ -104,7 +109,7 @@ pub fn write(fd: i32, buf: &const u8, count: usize) usize {
switch (fd) {
STDOUT_FILENO, STDERR_FILENO => {
send(Message.to(Server.Terminal, 1)
.data(buf[0..count]));
.withPayload(buf[0..count]));
},
else => unreachable,
}