client API: add mpv_create_weak_client()

3 files changed, 23 insertions, 2 deletions

diff --git a/player/client.c b/player/client.c
index a887a16d2a..d347033fe5 100644
--- a/player/client.c
+++ b/player/client.c
@@ -136,6 +136,7 @@ struct mpv_handle {
     uint64_t property_event_masks; // or-ed together event masks of all properties
 
     bool fuzzy_initialized; // see scripting.c wait_loaded()
+    bool is_weak;           // can not keep core alive on its own
     struct mp_log_buffer *messages;
 };
 
@@ -269,6 +270,13 @@ struct mpv_handle *mp_new_client(struct mp_client_api *clients, const char *name
     return client;
 }
 
+void mp_client_set_weak(struct mpv_handle *ctx)
+{
+    pthread_mutex_lock(&ctx->lock);
+    ctx->is_weak = true;
+    pthread_mutex_unlock(&ctx->lock);
+}
+
 const char *mpv_client_name(mpv_handle *ctx)
 {
     return ctx->name;
@@ -416,8 +424,11 @@ static void mp_destroy_client(mpv_handle *ctx, bool terminate)
     if (mpctx->is_cli) {
         terminate = false;
     } else {
-        // If the last mpv_handle got destroyed, destroy the core.
-        if (clients->num_clients == 0)
+        // If the last strong mpv_handle got destroyed, destroy the core.
+        bool has_strong_ref = false;
+        for (int n = 0; n < clients->num_clients; n++)
+            has_strong_ref |= !clients->clients[n]->is_weak;
+        if (!has_strong_ref)
             terminate = true;
 
         // Reserve the right to destroy mpctx for us.
@@ -550,6 +561,14 @@ mpv_handle *mpv_create_client(mpv_handle *ctx, const char *name)
     return new;
 }
 
+mpv_handle *mpv_create_weak_client(mpv_handle *ctx, const char *name)
+{
+    mpv_handle *new = mpv_create_client(ctx, name);
+    if (new)
+        mp_client_set_weak(new);
+    return new;
+}
+
 int mpv_initialize(mpv_handle *ctx)
 {
     lock_core(ctx);
diff --git a/player/client.h b/player/client.h
index deec3c793b..9ecbe2ed35 100644
--- a/player/client.h
+++ b/player/client.h
@@ -32,6 +32,7 @@ bool mp_client_event_is_registered(struct MPContext *mpctx, int event);
 void mp_client_property_change(struct MPContext *mpctx, const char *name);
 
 struct mpv_handle *mp_new_client(struct mp_client_api *clients, const char *name);
+void mp_client_set_weak(struct mpv_handle *ctx);
 struct mp_log *mp_client_get_log(struct mpv_handle *ctx);
 struct mpv_global *mp_client_get_global(struct mpv_handle *ctx);
 struct MPContext *mp_client_get_core(struct mpv_handle *ctx);
diff --git a/player/scripting.c b/player/scripting.c
index db622f0fe8..0838630bed 100644
--- a/player/scripting.c
+++ b/player/scripting.c
@@ -138,6 +138,7 @@ static int mp_load_script(struct MPContext *mpctx, const char *fname)
         talloc_free(arg);
         return -1;
     }
+    mp_client_set_weak(arg->client);
     arg->log = mp_client_get_log(arg->client);
 
     MP_DBG(arg, "Loading %s %s...\n", backend->name, fname);