API: Refactor: Implement api/handle module

This module will be used to implement remote management of objects through the
API. Object types to be registered must have a `uint64_t` field named 'handle'.

1 files changed, 31 insertions, 0 deletions

diff --git a/src/nvim/api/private/handle.c b/src/nvim/api/private/handle.c
new file mode 100644
index 0000000000..3bf519bc58
--- /dev/null
+++ b/src/nvim/api/private/handle.c
@@ -0,0 +1,31 @@
+#include <stdint.h>
+
+#include "nvim/vim.h"
+#include "nvim/map.h"
+#include "nvim/api/private/handle.h"
+
+#define HANDLE_INIT(name) name##_handles = map_new(uint64_t)()
+
+#define HANDLE_IMPL(type, name)                                               \
+  static Map(uint64_t) *name##_handles = NULL;                                \
+                                                                              \
+  type *handle_get_##name(uint64_t handle)                                    \
+  {                                                                           \
+    return map_get(uint64_t)(name##_handles, handle);                         \
+  }                                                                           \
+                                                                              \
+  void handle_register_##name(type *name)                                     \
+  {                                                                           \
+    assert(!name->handle);                                                    \
+    name->handle = next_handle++;                                             \
+    map_put(uint64_t)(name##_handles, name->handle, name);                    \
+  }                                                                           \
+                                                                              \
+  void handle_unregister_##name(type *name)                                   \
+  {                                                                           \
+    map_del(uint64_t)(name##_handles, name->handle);                          \
+  }
+
+void handle_init()
+{
+}