Introduce nvim namespace: Move files.

Move files from src/ to src/nvim/.
- src/nvim/ becomes the new root dir for nvim executable sources.
- src/libnvim/ is planned to become root dir of the neovim library.

src/nvim/os/time.c

@@ -0,0 +1,86 @@
+#include <stdint.h>
+#include <stdbool.h>
+#include <sys/time.h>
+
+#include <uv.h>
+
+#include "os/time.h"
+#include "vim.h"
+#include "term.h"
+
+static uv_mutex_t delay_mutex;
+static uv_cond_t delay_cond;
+
+static void microdelay(uint64_t ms);
+
+void time_init()
+{
+  uv_mutex_init(&delay_mutex);
+  uv_cond_init(&delay_cond);
+}
+
+void os_delay(uint64_t milliseconds, bool ignoreinput)
+{
+  os_microdelay(milliseconds * 1000, ignoreinput);
+}
+
+void os_microdelay(uint64_t microseconds, bool ignoreinput)
+{
+  int old_tmode;
+
+  if (ignoreinput) {
+    // Go to cooked mode without echo, to allow SIGINT interrupting us
+    // here
+    old_tmode = curr_tmode;
+
+    if (curr_tmode == TMODE_RAW)
+      settmode(TMODE_SLEEP);
+
+    microdelay(microseconds);
+
+    settmode(old_tmode);
+  } else {
+    microdelay(microseconds);
+  }
+}
+
+static void microdelay(uint64_t microseconds)
+{
+  uint64_t hrtime;
+  int64_t ns = microseconds * 1000;  // convert to nanoseconds
+
+  uv_mutex_lock(&delay_mutex);
+
+  while (ns > 0) {
+    hrtime =  uv_hrtime();
+    if (uv_cond_timedwait(&delay_cond, &delay_mutex, ns) == UV_ETIMEDOUT)
+      break;
+    ns -= uv_hrtime() - hrtime;
+  }
+
+  uv_mutex_unlock(&delay_mutex);
+}
+
+struct tm *os_localtime_r(const time_t *clock, struct tm *result)
+{
+#ifdef UNIX
+  // POSIX provides localtime_r() as a thread-safe version of localtime().
+  return localtime_r(clock, result);
+#else
+  // Windows version of localtime() is thread-safe.
+  // See http://msdn.microsoft.com/en-us/library/bf12f0hc%28VS.80%29.aspx
+  struct tm *local_time = localtime(clock);  // NOLINT
+  *result = *local_time;
+return result;
+#endif
+}
+
+struct tm *os_get_localtime(struct tm *result)
+{
+  struct timeval tv;
+  if (gettimeofday(&tv, NULL) < 0) {
+    return NULL;
+  }
+
+  return os_localtime_r(&tv.tv_sec, result);
+}