zig/std/os.zig
Andrew Kelley b581da41f8 remove compiler directives
* add `setFnTest`, `setFnVisible`, `setFnStaticEval`,
   `setFnNoInline` builtin functions to replace previous
   directive functionality
 * add `coldcc` and `nakedcc` as keywords which can be used as part
   of a function prototype.
 * `setDebugSafety` builtin can be used to set debug safety features
   at a per block scope level.
 * closes #169
2016-09-28 02:33:32 -04:00

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Zig

const system = switch(@compileVar("os")) {
linux => @import("linux.zig"),
darwin => @import("darwin.zig"),
else => @compileError("Unsupported OS"),
};
const errno = @import("errno.zig");
pub error Unexpected;
pub fn getRandomBytes(buf: []u8) -> %void {
while (true) {
const ret = switch (@compileVar("os")) {
linux => system.getrandom(buf.ptr, buf.len, 0),
darwin => system.getrandom(buf.ptr, buf.len),
else => @compileError("unsupported os"),
};
const err = system.getErrno(ret);
if (err > 0) {
return switch (err) {
errno.EINVAL => @unreachable(),
errno.EFAULT => @unreachable(),
errno.EINTR => continue,
else => error.Unexpected,
}
}
return;
}
}
pub coldcc fn abort() -> unreachable {
switch (@compileVar("os")) {
linux, darwin => {
system.raise(system.SIGABRT);
system.raise(system.SIGKILL);
while (true) {}
},
else => @compileError("unsupported os"),
}
}