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std: fix posix Thread.spawn to accept all startFn types

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This commit is contained in:
Andrius Mitkus 2020-04-20 18:18:50 +03:00 committed by Andrew Kelley
parent 0c037a8561
commit 6481b02fdc
1 changed files with 31 additions and 6 deletions
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37
lib/std/thread.zig
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@ -252,12 +252,37 @@ pub const Thread = struct {
}
}
fn posixThreadMain(ctx: ?*c_void) callconv(.C) ?*c_void {
if (@sizeOf(Context) == 0) {
_ = startFn({});
return null;
} else {
_ = startFn(@ptrCast(*const Context, @alignCast(@alignOf(Context), ctx)).*);
return null;
const arg = if (@sizeOf(Context) == 0) {} else @ptrCast(*Context, @alignCast(@alignOf(Context), ctx)).*;
switch (@typeInfo(@TypeOf(startFn).ReturnType)) {
.NoReturn => {
startFn(arg);
},
.Void => {
startFn(arg);
return null;
},
.Int => |info| {
if (info.bits != 8) {
@compileError(bad_startfn_ret);
}
// pthreads don't support exit status, ignore value
_ = startFn(arg);
return null;
},
.ErrorUnion => |info| {
if (info.payload != void) {
@compileError(bad_startfn_ret);
}
startFn(arg) catch |err| {
std.debug.warn("error: {}\n", .{@errorName(err)});
if (@errorReturnTrace()) |trace| {
std.debug.dumpStackTrace(trace.*);
}
};
return 0;
},
else => @compileError(bad_startfn_ret),
}
}
};