atproto relay implementation in zig
zlay.waow.tech
revert mallinfo2 to mallinfo — zig's bundled glibc lacks mallinfo2
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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src/broadcaster.zig
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src/broadcaster.zig
···
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}
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} else |_| {}
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// glibc malloc stats via mallinfo2 — uses size_t fields (no 2 GiB overflow),
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// reports across ALL thread arenas (mallinfo only reports the main arena)
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const mi = malloc_h.mallinfo2();
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const arena: u64 = mi.arena;
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const in_use: u64 = mi.uordblks;
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const free_bytes: u64 = mi.fordblks;
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const mmap_bytes: u64 = mi.hblkhd;
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// glibc malloc stats — mallinfo fields are c_int, bitcast to u32 to extend range to 4 GiB.
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// note: mallinfo only reports the main arena, not per-thread arenas.
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// for accurate total heap picture, rely on RssAnon from /proc/self/status above.
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const mi = malloc_h.mallinfo();
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const arena: u64 = @as(u32, @bitCast(mi.arena));
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const in_use: u64 = @as(u32, @bitCast(mi.uordblks));
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const free_bytes: u64 = @as(u32, @bitCast(mi.fordblks));
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const mmap_bytes: u64 = @as(u32, @bitCast(mi.hblkhd));
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std.fmt.format(w,
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\\# TYPE relay_malloc_arena_bytes gauge
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\\relay_malloc_arena_bytes {d}