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darwin: add ability to dealloc obtained thread list for a task

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This commit is contained in:
Jakub Konka 2022-12-13 15:29:49 +01:00
parent f505cb96f4
commit f5336a8fec
1 changed files with 15 additions and 2 deletions
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17
lib/std/os/darwin.zig
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@ -439,11 +439,24 @@ const mach_task = if (builtin.target.isDarwin()) struct {
} }
} }
pub fn getThreads(task: MachTask) MachError![]ThreadId { const ThreadList = struct {
buf: []ThreadId,
pub fn deinit(list: ThreadList) void {
const self_task = machTaskForSelf();
_ = std.c.vm_deallocate(
self_task.port,
@ptrToInt(list.buf.ptr),
@intCast(std.c.vm_size_t, list.buf.len * @sizeOf(std.c.mach_port_t)),
);
}
};
pub fn getThreads(task: MachTask) MachError!ThreadList {
var thread_list: std.c.mach_port_array_t = undefined; var thread_list: std.c.mach_port_array_t = undefined;
var thread_count: std.c.mach_msg_type_number_t = undefined; var thread_count: std.c.mach_msg_type_number_t = undefined;
switch (std.c.getKernError(std.c.task_threads(task.port, &thread_list, &thread_count))) { switch (std.c.getKernError(std.c.task_threads(task.port, &thread_list, &thread_count))) {
.SUCCESS => return @ptrCast([*]ThreadId, thread_list)[0..thread_count], .SUCCESS => return ThreadList{ .buf = @ptrCast([*]ThreadId, thread_list)[0..thread_count] },
else => |err| { else => |err| {
log.err("task_threads kernel call failed with error code: {s}", .{@tagName(err)}); log.err("task_threads kernel call failed with error code: {s}", .{@tagName(err)});
return error.Unexpected; return error.Unexpected;