From: Michael Jeanson <mjeanson@efficios.com>
Date: Thu, 18 Nov 2021 20:08:53 +0000 (-0500)
Subject: fix: use urcu-tls compat with c++ compiler
X-Git-Tag: v0.14.0~42
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=69fbb39e88b9ac568f0bdbf384932a0cc5c58a02;p=userspace-rcu.git

fix: use urcu-tls compat with c++ compiler

  * Initialize all fields of 'struct urcu_tls' to avoid :

    sorry, unimplemented: non-trivial designated initializers not supported

  * Cast void* to proper type pointers to avoid :

    error: invalid conversion from ‘void*’ to ...

Change-Id: I654f924324cda2eaea723f4a0759d706b2a2bf40
Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
---

diff --git a/include/urcu/tls-compat.h b/include/urcu/tls-compat.h
index a2c94de..431319d 100644
--- a/include/urcu/tls-compat.h
+++ b/include/urcu/tls-compat.h
@@ -116,6 +116,7 @@ struct urcu_tls {
 	type *__tls_access_ ## name(void)			\
 	{							\
 		static struct urcu_tls __tls_ ## name = {	\
+			.key = 0,				\
 			.init_mutex = PTHREAD_MUTEX_INITIALIZER,\
 			.init_done = 0,				\
 		};						\
@@ -132,9 +133,9 @@ struct urcu_tls {
 			pthread_mutex_unlock(&__tls_ ## name.init_mutex); \
 		}						\
 		cmm_smp_rmb();	/* read init_done before getting key */ \
-		__tls_p = pthread_getspecific(__tls_ ## name.key); \
+		__tls_p = (__typeof__(type) *) pthread_getspecific(__tls_ ## name.key); \
 		if (caa_unlikely(__tls_p == NULL)) {		\
-			__tls_p = calloc(1, sizeof(type));	\
+			__tls_p = (__typeof__(type) *) calloc(1, sizeof(type));	\
 			do_init					\
 			(void) pthread_setspecific(__tls_ ## name.key,	\
 				__tls_p);			\
diff --git a/tests/unit/test_build.c b/tests/unit/test_build.c
index b2786c5..7f062f1 100644
--- a/tests/unit/test_build.c
+++ b/tests/unit/test_build.c
@@ -59,6 +59,15 @@
 
 #include "tap.h"
 
+struct my_tls_struct {
+	int int1;
+	char char1;
+	void *void1;
+};
+
+static DEFINE_URCU_TLS(int, my_tls_int);
+static DEFINE_URCU_TLS(struct my_tls_struct, my_tls_struct);
+
 static void test_lfstack(void)
 {
 	struct cds_lfs_stack s;
@@ -97,6 +106,15 @@ void test_build_cds_list_head_init(void)
 	};
 }
 
+static
+void test_urcu_tls(void)
+{
+	URCU_TLS(my_tls_int) = 1;
+	URCU_TLS(my_tls_struct).int1 = 1;
+	URCU_TLS(my_tls_struct).char1 = 'a';
+	URCU_TLS(my_tls_struct).void1 = NULL;
+}
+
 int main(void)
 {
 	plan_tests(3);
@@ -105,6 +123,7 @@ int main(void)
 	test_wfstack();
 	test_wfcqueue();
 	test_build_cds_list_head_init();
+	test_urcu_tls();
 
 	return exit_status();
 }