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LWIP_NETCONN_SEM_PER_THREAD: ensure sys_sem_valid() is only called for non-NULL pointers (not all ports might check this)

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This commit is contained in:
goldsimon 2015-08-19 09:57:59 +02:00
parent 7df2dd67bd
commit a6bd0944db
1 changed files with 2 additions and 2 deletions
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4
src/api/api_lib.c
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@ -872,7 +872,7 @@ netconn_gethostbyname(const char *name, ip_addr_t *addr)
void netconn_thread_init(void) void netconn_thread_init(void)
{ {
sys_sem_t *sem = LWIP_NETCONN_THREAD_SEM_GET(); sys_sem_t *sem = LWIP_NETCONN_THREAD_SEM_GET();
if (!sys_sem_valid(sem)) { if ((sem == NULL) || !sys_sem_valid(sem)) {
/* call alloc only once */ /* call alloc only once */
LWIP_NETCONN_THREAD_SEM_ALLOC(); LWIP_NETCONN_THREAD_SEM_ALLOC();
LWIP_ASSERT("LWIP_NETCONN_THREAD_SEM_ALLOC() failed", sys_sem_valid(LWIP_NETCONN_THREAD_SEM_GET())); LWIP_ASSERT("LWIP_NETCONN_THREAD_SEM_ALLOC() failed", sys_sem_valid(LWIP_NETCONN_THREAD_SEM_GET()));
@ -882,7 +882,7 @@ void netconn_thread_init(void)
void netconn_thread_cleanup(void) void netconn_thread_cleanup(void)
{ {
sys_sem_t *sem = LWIP_NETCONN_THREAD_SEM_GET(); sys_sem_t *sem = LWIP_NETCONN_THREAD_SEM_GET();
if (sys_sem_valid(sem)) { if ((sem != NULL) && sys_sem_valid(sem)) {
/* call free only once */ /* call free only once */
LWIP_NETCONN_THREAD_SEM_FREE(); LWIP_NETCONN_THREAD_SEM_FREE();
} }