From ca3492213035ac6299fc54803520ee9427595181 Mon Sep 17 00:00:00 2001
From: wm4 <wm4@nowhere>
Date: Thu, 26 Mar 2020 23:39:35 +0100
Subject: client API: add a per client unique ID

I mostly intend this for internal purposes. Probably pretty useless for
external API users, but on the other hand trivial to expose. While it
makes a lot of sense internally, I'll probably regret exposing it.
---
 player/client.c | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

(limited to 'player')

diff --git a/player/client.c b/player/client.c
index 648ff1173c..41645b5d95 100644
--- a/player/client.c
+++ b/player/client.c
@@ -77,6 +77,7 @@ struct mp_client_api {
     // used to safely unlock mp_client_api.lock while iterating the list of
     // clients.
     uint64_t clients_list_change_ts;
+    int64_t id_alloc;
 
     struct mp_custom_protocol *custom_protocols;
     int num_custom_protocols;
@@ -111,6 +112,7 @@ struct mpv_handle {
     struct mp_log *log;
     struct MPContext *mpctx;
     struct mp_client_api *clients;
+    int64_t id;
 
     // -- not thread-safe
     struct mpv_event *cur_event;
@@ -223,13 +225,32 @@ bool mp_clients_all_initialized(struct MPContext *mpctx)
     return all_ok;
 }
 
+static struct mpv_handle *find_client_id(struct mp_client_api *clients, int64_t id)
+{
+    for (int n = 0; n < clients->num_clients; n++) {
+        if (clients->clients[n]->id == id)
+            return clients->clients[n];
+    }
+    return NULL;
+}
+
 static struct mpv_handle *find_client(struct mp_client_api *clients,
                                       const char *name)
 {
+    if (name[0] == '@') {
+        char *end;
+        errno = 0;
+        long long int id = strtoll(name + 1, &end, 10);
+        if (errno || end[0])
+            return NULL;
+        return find_client_id(clients, id);
+    }
+
     for (int n = 0; n < clients->num_clients; n++) {
         if (strcmp(clients->clients[n]->name, name) == 0)
             return clients->clients[n];
     }
+
     return NULL;
 }
 
@@ -271,6 +292,7 @@ struct mpv_handle *mp_new_client(struct mp_client_api *clients, const char *name
         .log = mp_log_new(client, clients->mpctx->log, nname),
         .mpctx = clients->mpctx,
         .clients = clients,
+        .id = ++(clients->id_alloc),
         .cur_event = talloc_zero(client, struct mpv_event),
         .events = talloc_array(client, mpv_event, num_events),
         .max_events = num_events,
@@ -308,6 +330,11 @@ const char *mpv_client_name(mpv_handle *ctx)
     return ctx->name;
 }
 
+int64_t mpv_client_id(mpv_handle *ctx)
+{
+    return ctx->id;
+}
+
 struct mp_log *mp_client_get_log(struct mpv_handle *ctx)
 {
     return ctx->log;
-- 
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