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mach: add a standard way to access platform specific structs

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This is done by adding platform.zig which is a file providing types like
``CoreType``, ``GpuDriverType`` and ``BackingTimerType``.
This commit is contained in:
iddev5 2022-05-23 13:23:26 +05:30 • committed by Stephen Gutekanst
parent e5050e856e
commit f3e2b8b74c
5 changed files with 74 additions and 77 deletions
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40
src/Timer.zig
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@ -1,48 +1,14 @@
const std = @import("std");
const builtin = @import("builtin");
const platform = @import("platform.zig");
const Timer = @This();
backing_timer: BackingTimerType = undefined,
// TODO: verify declarations and its signatures
const BackingTimerType = if (builtin.cpu.arch == .wasm32) struct {
initial: f64 = undefined,
const js = struct {
extern fn machPerfNow() f64;
};
const WasmTimer = @This();
fn start() !WasmTimer {
return WasmTimer{ .initial = js.machPerfNow() };
}
fn read(timer: *WasmTimer) u64 {
return timeToNs(js.machPerfNow() - timer.initial);
}
fn reset(timer: *WasmTimer) void {
timer.initial = js.machPerfNow();
}
fn lap(timer: *WasmTimer) u64 {
const now = js.machPerfNow();
const initial = timer.initial;
timer.initial = now;
return timeToNs(now - initial);
}
fn timeToNs(t: f64) u64 {
return @floatToInt(u64, t) * 1000000;
}
} else std.time.Timer;
backing_timer: platform.BackingTimerType = undefined,
/// Initialize the timer.
pub fn start() !Timer {
return Timer{
.backing_timer = try BackingTimerType.start(),
.backing_timer = try platform.BackingTimerType.start(),
};
}