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naming: shm → shared_memory — 'shm' is a Unix clipping, not an acronym

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Per docs/coding-standards.md (no Unix-abbreviation exception): syscalls
shared_memory_create/map/physical, kernel SharedMemoryObject + handlers,
runtime.shared_memory (library/runtime/shared-memory.zig), the
shared-memory-server/-client test services, the shared-memory QEMU case,
and docs incl. vdso.md's danos_shared_memory_*. 87/87 QEMU tests pass.
This commit is contained in:
Daniel Samson
2026-07-21 17:26:15 +01:00
parent ec6e888076
commit 0045fd87ba
23 changed files with 192 additions and 192 deletions
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system/services/display/backend.zig
+1 -1
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@@ -160,7 +160,7 @@ fn presentSpan(destination: [*]volatile u32, source: [*]const u32, count: usize)
pub const Mode = scanout_protocol.Mode;
/// The native virtio-gpu backend: the compositor composes into a **shared** scanout surface
/// (an `shm` region the driver created and handed over) and `present` asks the driver to put
/// (a shared-memory region the driver created and handed over) and `present` asks the driver to put
/// a frame on the panel over its `.scanout` endpoint. Unlike GOP there is no local copy — the
/// surface *is* the device's resource backing, so compositing writes land straight where the
/// driver transfers-and-flushes from (x86 DMA is cache-coherent, so the cacheable shared pages
system/services/display/display.zig
+2 -2
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@@ -307,10 +307,10 @@ fn verifyNativePresent() void {
fn attachScanout(stride: u32, width: u32, height: u32, format: u32, refresh_hz: u32, capability: ?ipc.Handle, reply: []u8) usize {
const cap = capability orelse return fail(reply);
if (width == 0 or height == 0 or stride < width) return fail(reply);
const mapped = runtime.shm.map(cap) orelse return fail(reply);
const mapped = runtime.shared_memory.map(cap) orelse return fail(reply);
const scanout = ipc.lookup(.scanout) orelse return fail(reply);
// A second announce means the driver died and was restarted (V6): re-attach to its fresh
// scanout. (The previous shared mapping leaks — there is no shm_unmap syscall yet — but the
// scanout. (The previous shared mapping leaks — there is no shared_memory_unmap syscall yet — but the
// frames are the dead driver's, reclaimed on its exit; a handful across a crash is benign.)
const reattach = switch (backend) {
.virtio => true,