Added a comment in keeper_call()

1 files changed, 4 insertions, 0 deletions

diff --git a/src/keeper.c b/src/keeper.c
index 861597a..9affbdf 100644
--- a/src/keeper.c
+++ b/src/keeper.c
@@ -692,6 +692,10 @@ int keeper_call( lua_State *K, keeper_api_t _func, lua_State *L, void *linda, ui
                 lua_call( K, 1 + args, LUA_MULTRET);
 
                 retvals = lua_gettop( K) - Ktos;
+                // note that this can raise a luaL_error while the keeper state (and its mutex) is acquired
+                // this may interrupt a lane, causing the destruction of the underlying OS thread
+                // after this, another lane making use of this keeper can get an error code from the mutex-locking function
+                // when attempting to grab the mutex again (WINVER <= 0x400 does this, but locks just fine, I don't know about pthread)
                 if( (retvals > 0) && luaG_inter_move( K, L, retvals, eLM_FromKeeper) != 0) // K->L
                 {
                         retvals = -1;