Improve map module: Change scopes

- Move `Map` structure definition to `map_defs.h`
- Use `KHASH_DECLARE` on map_defs.h to declare khash function prototypes.
- Redefine `map_foreach` into a macro
- Refactor server.c module to use the new `map_foreach` macro.

src/nvim/map.c

@@ -8,15 +8,7 @@
 
 #include "nvim/lib/khash.h"
 
-typedef struct {
+__KHASH_IMPL(Map,, kh_cstr_t, void *, 1, kh_str_hash_func, kh_str_hash_equal)
-  void *ptr;
-} Value;
-
-KHASH_MAP_INIT_STR(Map, Value)
-
-struct map {
-  khash_t(Map) *table;
-};
 
 Map *map_new()
 {
@@ -40,7 +32,7 @@ void *map_get(Map *map, const char *key)
     return NULL;
   }
 
-  return kh_val(map->table, k).ptr;
+  return kh_val(map->table, k);
 }
 
 bool map_has(Map *map, const char *key)
@@ -53,15 +45,14 @@ void *map_put(Map *map, const char *key, void *value)
   int ret;
   void *rv = NULL;
   khiter_t k = kh_put(Map, map->table, key, &ret);
-  Value val = {.ptr = value};
 
   if (!ret) {
     // key present, return the current value
-    rv = kh_val(map->table, k).ptr;
+    rv = kh_val(map->table, k);
     kh_del(Map, map->table, k);
   }
 
-  kh_val(map->table, k) = val;
+  kh_val(map->table, k) = value;
 
   return rv;
 }
@@ -72,20 +63,10 @@ void *map_del(Map *map, const char *key)
   khiter_t k;
 
   if ((k = kh_get(Map, map->table, key)) != kh_end(map->table)) {
-    rv = kh_val(map->table, k).ptr;
+    rv = kh_val(map->table, k);
     kh_del(Map, map->table, k);
   }
 
   return rv;
 }
 
-void map_foreach(Map *map, key_value_cb cb)
-{
-  const char *key;
-  Value value;
-
-  kh_foreach(map->table, key, value, {
-    cb(map, (const char *)key, value.ptr);
-  });
-}
-

src/nvim/map.h

@@ -47,11 +47,11 @@ void *map_put(Map *map, const char *key, void *value);
 /// @return The current value if exists or NULL otherwise
 void *map_del(Map *map, const char *key);
 
-/// Iterates through each key/value pair in the map
+#define map_foreach(map, key, value, block) \
-///
+  kh_foreach(map->table, key, value, block)
-/// @param map The `Map` instance
+
-/// @param cb A function that will be called for each key/value
+#define map_foreach_value(map, value, block) \
-void map_foreach(Map *map, key_value_cb cb);
+  kh_foreach_value(map->table, value, block)
 
 #endif  // NVIM_MAP_H
 

src/nvim/map_defs.h

@@ -1,7 +1,14 @@
 #ifndef NVIM_MAP_DEFS_H
 #define NVIM_MAP_DEFS_H
 
-typedef struct map Map;
+#include "nvim/lib/khash.h"
+
+KHASH_DECLARE(Map, kh_cstr_t, void *)
+
+typedef struct {
+  khash_t(Map) *table;
+} Map;
+
 
 /// Callback for iterating through each key/value pair in a map
 ///

src/nvim/os/server.c

@@ -45,7 +45,6 @@ typedef struct {
 
 static Map *servers = NULL;
 
-static void close_server(Map *map, const char *endpoint, void *server);
 static void connection_cb(uv_stream_t *server, int status);
 static void free_client(uv_handle_t *handle);
 static void free_server(uv_handle_t *handle);
@@ -70,7 +69,15 @@ void server_teardown()
     return;
   }
 
-  map_foreach(servers, close_server);
+  Server *server;
+
+  map_foreach_value(servers, server, {
+    if (server->type == kServerTypeTcp) {
+      uv_close((uv_handle_t *)&server->socket.tcp.handle, free_server);
+    } else {
+      uv_close((uv_handle_t *)&server->socket.pipe.handle, free_server);
+    }
+  });
 }
 
 void server_start(char *endpoint, ChannelProtocol prot)
@@ -221,17 +228,6 @@ static void connection_cb(uv_stream_t *server, int status)
   channel_from_stream(client, srv->protocol);
 }
 
-static void close_server(Map *map, const char *endpoint, void *srv)
-{
-  Server *server = srv;
-
-  if (server->type == kServerTypeTcp) {
-    uv_close((uv_handle_t *)&server->socket.tcp.handle, free_server);
-  } else {
-    uv_close((uv_handle_t *)&server->socket.pipe.handle, free_server);
-  }
-}
-
 static void free_client(uv_handle_t *handle)
 {
   free(handle);