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nuttx.zig
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nuttx.zig
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//! LVGL Functions specific to Apache NuttX RTOS
/// Import the Zig Standard Library
const std = @import("std");
const builtin = @import("builtin");
///////////////////////////////////////////////////////////////////////////////
// Panic Handler
/// Called by Zig when it hits a Panic. We print the Panic Message, Stack Trace and halt. See
/// https://andrewkelley.me/post/zig-stack-traces-kernel-panic-bare-bones-os.html
/// https://github.com/ziglang/zig/blob/master/lib/std/builtin.zig#L763-L847
pub fn panic(message: []const u8, _stack_trace: ?*std.builtin.StackTrace) noreturn {
// Print the Panic Message
_ = _stack_trace;
_ = puts("\n!ZIG PANIC!");
_ = puts(@ptrCast([*c]const u8, message));
// Print the Stack Trace
_ = puts("Stack Trace:");
var it = std.debug.StackIterator.init(@returnAddress(), null);
while (it.next()) |return_address| {
_ = printf("%p\n", return_address);
}
// Halt
while (true) {}
}
///////////////////////////////////////////////////////////////////////////////
// Logging
/// Called by Zig for `std.log.debug`, `std.log.info`, `std.log.err`, ...
/// https://gist.github.com/leecannon/d6f5d7e5af5881c466161270347ce84d
pub fn log(
comptime _message_level: std.log.Level,
comptime _scope: @Type(.EnumLiteral),
comptime format: []const u8,
args: anytype,
) void {
_ = _message_level;
_ = _scope;
// Format the message
var buf: [100]u8 = undefined; // Limit to 100 chars
var slice = std.fmt.bufPrint(&buf, format, args) catch {
_ = puts("*** log error: buf too small");
return;
};
// Terminate the formatted message with a null
var buf2: [buf.len + 1:0]u8 = undefined;
std.mem.copy(u8, buf2[0..slice.len], slice[0..slice.len]);
buf2[slice.len] = 0;
// Print the formatted message
_ = puts(&buf2);
}
///////////////////////////////////////////////////////////////////////////////
// Imported Functions and Variables
/// For safety, we import these functions ourselves to enforce Null-Terminated Strings.
/// We changed `[*c]const u8` to `[*:0]const u8`
extern fn printf(format: [*:0]const u8, ...) c_int;
extern fn puts(str: [*:0]const u8) c_int;
/// Aliases for Zig Standard Library
const assert = std.debug.assert;
const debug = std.log.debug;