48 lines
1.7 KiB
Zig
48 lines
1.7 KiB
Zig
//! test/system/services/shared-memory-client — the creating half of the shared-memory test (docs/display-v2.md V2).
|
|
//! It `shared_memory_create`s a shared region, writes a known pattern into it, and hands the region's
|
|
//! capability to `shared-memory-server` as an `ipc_call` send_cap. The server maps that capability and
|
|
//! confirms the pattern is visible — proving cross-process shared memory over the extended
|
|
//! capability-passing path.
|
|
|
|
|
|
const channel = @import("channel");
|
|
const ipc = @import("ipc");
|
|
const time = @import("time");
|
|
const memory = @import("memory");
|
|
const logging = @import("logging");
|
|
const pattern_len = 4096;
|
|
|
|
/// The pattern the server checks — must match shared-memory-server.zig.
|
|
fn expected(i: usize) u8 {
|
|
return @truncate(i *% 7 +% 3);
|
|
}
|
|
|
|
fn lookupServer() ?ipc.Handle {
|
|
var attempts: usize = 0;
|
|
while (attempts < 100) : (attempts += 1) {
|
|
if (channel.openEndpoint("test/shared-memory")) |h| return h;
|
|
time.sleepMillis(50);
|
|
}
|
|
return null;
|
|
}
|
|
|
|
pub fn main() void {
|
|
const region = memory.sharedCreate(pattern_len) orelse {
|
|
_ = logging.write("shared-memory: create failed\n");
|
|
return;
|
|
};
|
|
var i: usize = 0;
|
|
while (i < pattern_len) : (i += 1) region.ptr[i] = expected(i);
|
|
|
|
const server = lookupServer() orelse {
|
|
_ = logging.write("shared-memory: no server\n");
|
|
return;
|
|
};
|
|
// A non-empty message (so it reaches on_message, not the ping path), carrying the shared-memory
|
|
// region's capability. The reply is empty; we just need the round trip.
|
|
var reply: [64]u8 = undefined;
|
|
_ = ipc.callCap(server, "shared-memory", &reply, region.handle) catch {
|
|
_ = logging.write("shared-memory: call failed\n");
|
|
};
|
|
}
|