60cd11bd4b
It had the downside of running all the comptime blocks and resolving all the usingnamespaces of each system, when just trying to discover if the current system is a particular one. For Darwin, where it's nice to use `std.Target.current.isDarwin()`, this demonstrates the utility that #425 would provide.
59 lines
2.2 KiB
Zig
59 lines
2.2 KiB
Zig
const std = @import("../std.zig");
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const assert = std.debug.assert;
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const builtin = @import("builtin");
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const macho = std.macho;
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usingnamespace @import("../os/bits.zig");
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extern "c" fn __error() *c_int;
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pub extern "c" fn _NSGetExecutablePath(buf: [*]u8, bufsize: *u32) c_int;
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pub extern "c" fn _dyld_get_image_header(image_index: u32) ?*mach_header;
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pub extern "c" fn __getdirentries64(fd: c_int, buf_ptr: [*]u8, buf_len: usize, basep: *i64) isize;
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pub extern "c" fn mach_absolute_time() u64;
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pub extern "c" fn mach_timebase_info(tinfo: ?*mach_timebase_info_data) void;
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pub extern "c" fn kevent64(
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kq: c_int,
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changelist: [*]const kevent64_s,
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nchanges: c_int,
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eventlist: [*]kevent64_s,
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nevents: c_int,
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flags: c_uint,
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timeout: ?*const timespec,
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) c_int;
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const mach_hdr = if (@sizeOf(usize) == 8) mach_header_64 else mach_header;
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/// The value of the link editor defined symbol _MH_EXECUTE_SYM is the address
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/// of the mach header in a Mach-O executable file type. It does not appear in
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/// any file type other than a MH_EXECUTE file type. The type of the symbol is
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/// absolute as the header is not part of any section.
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/// This symbol is populated when linking the system's libc, which is guaranteed
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/// on this operating system. However when building object files or libraries,
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/// the system libc won't be linked until the final executable. So we
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/// export a weak symbol here, to be overridden by the real one.
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pub extern "c" var _mh_execute_header: mach_hdr = undefined;
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comptime {
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if (std.Target.current.isDarwin()) {
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@export("_mh_execute_header", _mh_execute_header, .Weak);
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}
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}
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pub const mach_header_64 = macho.mach_header_64;
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pub const mach_header = macho.mach_header;
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pub const _errno = __error;
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pub extern "c" fn mach_host_self() mach_port_t;
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pub extern "c" fn clock_get_time(clock_serv: clock_serv_t, cur_time: *mach_timespec_t) kern_return_t;
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pub extern "c" fn host_get_clock_service(host: host_t, clock_id: clock_id_t, clock_serv: ?[*]clock_serv_t) kern_return_t;
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pub extern "c" fn mach_port_deallocate(task: ipc_space_t, name: mach_port_name_t) kern_return_t;
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pub fn sigaddset(set: *sigset_t, signo: u5) void {
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set.* |= u32(1) << (signo - 1);
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}
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pub extern "c" fn sigaltstack(ss: ?*stack_t, old_ss: ?*stack_t) c_int;
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