--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/third_party/libuv/src/unix/cygwin.c	Wed Jan 14 19:39:52 2026 -0800
@@ -0,0 +1,93 @@
+/* Copyright libuv project contributors. All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include "uv.h"
+#include "internal.h"
+
+#include <sys/sysinfo.h>
+#include <unistd.h>
+
+int uv_uptime(double* uptime) {
+  struct sysinfo info;
+
+  if (sysinfo(&info) < 0)
+    return UV__ERR(errno);
+
+  *uptime = info.uptime;
+  return 0;
+}
+
+int uv_resident_set_memory(size_t* rss) {
+  char buf[1024];
+  const char* s;
+  long val;
+  int rc;
+  int i;
+  struct sysinfo si;
+
+  /* rss: 24th element */
+  rc = uv__slurp("/proc/self/stat", buf, sizeof(buf));
+  if (rc < 0)
+    return rc;
+
+  /* find the last ')' */
+  s = strrchr(buf, ')');
+  if (s == NULL)
+    goto err;
+
+  for (i = 1; i <= 22; i++) {
+    s = strchr(s + 1, ' ');
+    if (s == NULL)
+      goto err;
+  }
+
+  errno = 0;
+  val = strtol(s, NULL, 10);
+  if (val < 0 || errno != 0)
+    goto err;
+
+  do
+    rc = sysinfo(&si);
+  while (rc == -1 && errno == EINTR);
+  if (rc == -1)
+    return UV__ERR(errno);
+
+  *rss = val * si.mem_unit;
+  return 0;
+
+err:
+  return UV_EINVAL;
+}
+
+int uv_cpu_info(uv_cpu_info_t** cpu_infos, int* count) {
+  /* FIXME: read /proc/stat? */
+  *cpu_infos = NULL;
+  *count = 0;
+  return UV_ENOSYS;
+}
+
+uint64_t uv_get_constrained_memory(void) {
+  return 0;  /* Memory constraints are unknown. */
+}
+
+uint64_t uv_get_available_memory(void) {
+  return uv_get_free_memory();
+}