69 lines
2.0 KiB
Plaintext
69 lines
2.0 KiB
Plaintext
// Typed allocation helpers over the Allocator protocol (std/mem.sx):
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// create/destroy (one T), alloc/free (slices), clone, resize, and the
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// bytes-level mem_realloc. Declared `ufcs` — the dot spelling
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// (`context.allocator.create(Session)`), the pipe spelling, and the
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// direct call all hit the same generic machinery. Contents are
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// UNINITIALISED by design
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// (Zig-aligned): assign before reading. TrackingAllocator balances to
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// zero across every pair.
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#import "modules/std.sx";
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#import "modules/std/mem.sx";
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Session :: struct { id: s64; score: s64; }
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main :: () {
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gpa := GPA.init();
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tracker := TrackingAllocator.init(xx gpa);
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a : Allocator = xx tracker;
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// create / destroy — direct spelling
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s := create(a, Session);
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s.id = 7; s.score = 42;
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print("create: {} {}\n", s.id, s.score);
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destroy(a, s);
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// create — fluent pipe spelling
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p := a |> create(Session);
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p.id = 1;
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print("pipe-create: {}\n", p.id);
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a |> destroy(p);
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// create — canonical dot spelling on context.allocator
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q := context.allocator.create(Session);
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q.id = 2;
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print("dot-create: {}\n", q.id);
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context.allocator.destroy(q);
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// alloc / free — typed slice
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xs := a |> alloc(s64, 4);
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xs[0] = 10; xs[1] = 20; xs[2] = 30; xs[3] = 40;
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print("alloc: {} {} len={}\n", xs[0], xs[3], xs.len);
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// clone — independent copy (canonical dot spelling)
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ys := xs.clone(a);
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xs[0] = 99;
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print("clone: {} (orig {})\n", ys[0], xs[0]);
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a.free(ys);
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// resize — grow (copies, old backing freed)
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zs := xs |> resize(a, 6);
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zs[5] = 60;
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print("resize: {} {} len={}\n", zs[1], zs[5], zs.len);
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// resize — shrink
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ws := zs |> resize(a, 2);
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print("shrink: {} {} len={}\n", ws[0], ws[1], ws.len);
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a |> free(ws);
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// mem_realloc — bytes level
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raw := a.alloc_bytes(8);
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q : *s64 = xx raw;
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q.* = 1234;
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raw2 := mem_realloc(a, raw, 8, 16, 8);
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q2 : *s64 = xx raw2;
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print("realloc: {}\n", q2.*);
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a.dealloc_bytes(raw2);
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tracker.report();
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}
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