libuv: Sem

src/libuv/Sem.zig

@@ -0,0 +1,35 @@
+//! Semaphores implemented via libuv.
+const Sem = @This();
+
+const std = @import("std");
+const Allocator = std.mem.Allocator;
+const testing = std.testing;
+const c = @import("c.zig");
+const errors = @import("error.zig");
+
+sem: *c.uv_sem_t,
+
+pub fn init(alloc: Allocator, value: u32) !Sem {
+    const sem = try alloc.create(c.uv_sem_t);
+    try errors.convertError(c.uv_sem_init(sem, value));
+    return Sem{ .sem = sem };
+}
+
+pub fn deinit(self: *Sem, alloc: Allocator) void {
+    c.uv_sem_destroy(self.sem);
+    alloc.destroy(self.sem);
+    self.* = undefined;
+}
+
+pub fn post(self: Sem) void {
+    c.uv_sem_post(self.sem);
+}
+
+pub fn wait(self: Sem) void {
+    c.uv_sem_wait(self.sem);
+}
+
+test {
+    var sem = try init(testing.allocator, 0);
+    defer sem.deinit(testing.allocator);
+}

src/libuv/main.zig

@@ -1,7 +1,9 @@
 const Loop = @import("Loop.zig");
+const Sem = @import("Sem.zig");
 const Error = @import("error.zig").Error;
 
 test {
     _ = Loop;
+    _ = Sem;
     _ = Error;
 }