From 9a7265d842aafd41db7c6b9eddb93b186a5d74d8 Mon Sep 17 00:00:00 2001
From: William Yang <mscame@gmail.com>
Date: Tue, 26 Sep 2023 17:58:38 +0200
Subject: [PATCH] squash: GRegLock switch to pthread mutex

---
 c_src/quicer_nif.c | 11 +++--------
 c_src/quicer_reg.c | 22 ++++++++++++----------
 2 files changed, 15 insertions(+), 18 deletions(-)

diff --git a/c_src/quicer_nif.c b/c_src/quicer_nif.c
index b11482ce..293dced9 100644
--- a/c_src/quicer_nif.c
+++ b/c_src/quicer_nif.c
@@ -774,7 +774,7 @@ ERL_NIF_TERM ATOM_QUIC_DATAGRAM_SEND_CANCELED;
   ATOM(ATOM_UNDEFINED, undefined);
 
 extern QuicerRegistrationCTX *G_r_ctx;
-extern ErlNifMutex *GRegLock;
+extern pthread_mutex_t GRegLock;
 
 const QUIC_API_TABLE *MsQuic = NULL;
 // Mutex for MsQuic
@@ -978,11 +978,6 @@ on_load(ErlNifEnv *env,
       MsQuicLock = enif_mutex_create("msquic_lock");
     }
 
-  if (!GRegLock)
-    {
-      GRegLock = enif_mutex_create("global_reg_lock");
-    }
-
 // init atoms in use.
 #define ATOM(name, val)                                                       \
   {                                                                           \
@@ -1134,7 +1129,7 @@ closeLib(__unused_parm__ ErlNifEnv *env,
     {
       TP_NIF_3(do_close, MsQuic, 0);
 
-      enif_mutex_lock(GRegLock);
+      pthread_mutex_lock(&GRegLock);
       // end of the world
       if (G_r_ctx && !G_r_ctx->is_released)
         {
@@ -1146,7 +1141,7 @@ closeLib(__unused_parm__ ErlNifEnv *env,
           destroy_r_ctx(G_r_ctx);
           G_r_ctx = NULL;
         }
-      enif_mutex_unlock(GRegLock);
+      pthread_mutex_unlock(&GRegLock);
 
       MsQuicClose(MsQuic);
       MsQuic = NULL;
diff --git a/c_src/quicer_reg.c b/c_src/quicer_reg.c
index 55b3531b..ee65a8d0 100644
--- a/c_src/quicer_reg.c
+++ b/c_src/quicer_reg.c
@@ -20,7 +20,7 @@ static BOOLEAN parse_reg_conf(ERL_NIF_TERM eprofile,
                               QUIC_REGISTRATION_CONFIG *RegConfig);
 
 QuicerRegistrationCTX *G_r_ctx = NULL;
-ErlNifMutex *GRegLock = NULL;
+pthread_mutex_t GRegLock = PTHREAD_MUTEX_INITIALIZER;
 
 /*
 ** For global registration only
@@ -34,18 +34,20 @@ registration(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[])
   QUIC_STATUS status;
   ERL_NIF_TERM res = ATOM_OK;
 
-  if (!MsQuic || !GRegLock || G_r_ctx)
+  if (!MsQuic || G_r_ctx)
     {
       return ERROR_TUPLE_2(ATOM_BADARG);
     }
 
-  enif_mutex_lock(GRegLock);
+  //enif_mutex_lock(GRegLock);
+  pthread_mutex_lock(&GRegLock);
+
   if (argc == 1)
     {
       eprofile = argv[0];
       if (!parse_reg_conf(eprofile, &RegConfig))
         {
-          enif_mutex_unlock(GRegLock);
+          pthread_mutex_unlock(&GRegLock);
           return ERROR_TUPLE_2(ATOM_BADARG);
         }
     }
@@ -53,7 +55,7 @@ registration(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[])
   QuicerRegistrationCTX *r_ctx = init_r_ctx();
   if (!r_ctx)
     {
-      enif_mutex_unlock(GRegLock);
+      pthread_mutex_unlock(&GRegLock);
       return ERROR_TUPLE_2(ATOM_ERROR_NOT_ENOUGH_MEMORY);
     }
 
@@ -65,7 +67,7 @@ registration(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[])
     }
 
   G_r_ctx = r_ctx;
-  enif_mutex_unlock(GRegLock);
+  pthread_mutex_unlock(&GRegLock);
 
   // nif owns the global registration
   // thus not return to the erlang side
@@ -73,7 +75,7 @@ registration(ErlNifEnv *env, int argc, const ERL_NIF_TERM argv[])
 
 exit:
   destroy_r_ctx(r_ctx);
-  enif_mutex_unlock(GRegLock);
+  pthread_mutex_unlock(&GRegLock);
   return res;
 }
 
@@ -86,19 +88,19 @@ deregistration(__unused_parm__ ErlNifEnv *env,
                __unused_parm__ const ERL_NIF_TERM argv[])
 {
   int error_code = 0;
-  if (!MsQuic || !GRegLock)
+  if (!MsQuic)
     {
       return ERROR_TUPLE_2(ATOM_BADARG);
     }
 
-  enif_mutex_lock(GRegLock);
+  pthread_mutex_lock(&GRegLock);
   if (G_r_ctx && !G_r_ctx->is_released)
     {
       MsQuic->RegistrationShutdown(G_r_ctx->Registration, FALSE, error_code);
       destroy_r_ctx(G_r_ctx);
       G_r_ctx = NULL;
     }
-  enif_mutex_unlock(GRegLock);
+  pthread_mutex_unlock(&GRegLock);
   return ATOM_OK;
 }