diff --git a/base_c/src/condition_variable.c b/base_c/src/condition_variable.c
index 575bb33..60782b7 100644
--- a/base_c/src/condition_variable.c
+++ b/base_c/src/condition_variable.c
@@ -33,8 +33,9 @@
 int embb_condition_wait_for(embb_condition_t* condition_var,
                             embb_mutex_t* mutex,
                             const embb_duration_t* duration) {
-  assert(condition_var != NULL);
-  assert(mutex != NULL);
+  if (condition_var == NULL || mutex == NULL) {
+    return EMBB_ERROR;
+  }
   embb_time_t time;
   int status = embb_time_in(&time, duration);
   if (status != EMBB_SUCCESS) {
@@ -46,27 +47,34 @@ int embb_condition_wait_for(embb_condition_t* condition_var,
 #ifdef EMBB_PLATFORM_THREADING_WINTHREADS
 
 int embb_condition_init(embb_condition_t* condition_var) {
-  assert(condition_var != NULL);
+  if (condition_var == NULL) {
+    return EMBB_ERROR;
+  }
   InitializeConditionVariable(condition_var);
   return EMBB_SUCCESS;
 }
 
 int embb_condition_notify_one(embb_condition_t* condition_var) {
-  assert(condition_var != NULL);
+  if (condition_var == NULL) {
+    return EMBB_ERROR;
+  }
   WakeConditionVariable(condition_var);
   return EMBB_SUCCESS;
 }
 
 int embb_condition_notify_all(embb_condition_t* condition_var) {
-  assert(condition_var != NULL);
+  if (condition_var == NULL) {
+    return EMBB_ERROR;
+  }
   WakeAllConditionVariable(condition_var);
   return EMBB_SUCCESS;
 }
 
 int embb_condition_wait(embb_condition_t* condition_var,
                         embb_mutex_t* mutex) {
-  assert(condition_var != NULL);
-  assert(mutex != NULL);
+  if (condition_var == NULL || mutex == NULL) {
+    return EMBB_ERROR;
+  }
   if (SleepConditionVariableCS(condition_var, mutex, INFINITE)) {
     return EMBB_SUCCESS;
   }
@@ -75,9 +83,9 @@ int embb_condition_wait(embb_condition_t* condition_var,
 
 int embb_condition_wait_until(embb_condition_t* condition_var,
                               embb_mutex_t* mutex, const embb_time_t* time) {
-  assert(condition_var != NULL);
-  assert(mutex != NULL);
-  assert(time != NULL);
+  if (condition_var == NULL || mutex == NULL || time == NULL) {
+    return EMBB_ERROR;
+  }
   /* The Windows API needs a time duration, so we need to convert the given time
      by using the time now. */
   embb_time_t now;
@@ -103,7 +111,9 @@ int embb_condition_wait_until(embb_condition_t* condition_var,
 }
 
 int embb_condition_destroy(embb_condition_t* condition_var) {
-  assert(condition_var != NULL);
+  if (condition_var == NULL) {
+    return EMBB_ERROR;
+  }
   EMBB_UNUSED_IN_RELEASE(condition_var);
   return EMBB_SUCCESS;
 }
@@ -113,35 +123,42 @@ int embb_condition_destroy(embb_condition_t* condition_var) {
 #ifdef EMBB_PLATFORM_THREADING_POSIXTHREADS
 
 int embb_condition_init(embb_condition_t* condition_var) {
-  assert(condition_var != NULL);
+  if (condition_var == NULL) {
+    return EMBB_ERROR;
+  }
   int result = pthread_cond_init(condition_var, NULL);
   return result == 0 ? EMBB_SUCCESS : EMBB_ERROR;
 }
 
 int embb_condition_notify_one(embb_condition_t* condition_var) {
-  assert(condition_var != NULL);
+  if (condition_var == NULL) {
+    return EMBB_ERROR;
+  }
   int result = pthread_cond_signal(condition_var);
   return result == 0 ? EMBB_SUCCESS : EMBB_ERROR;
 }
 
 int embb_condition_notify_all(embb_condition_t* condition_var) {
-  assert(condition_var != NULL);
+  if (condition_var == NULL) {
+    return EMBB_ERROR;
+  }
   int result = pthread_cond_broadcast(condition_var);
   return result == 0 ? EMBB_SUCCESS : EMBB_ERROR;
 }
 
 int embb_condition_wait(embb_condition_t* condition_var, embb_mutex_t* mutex) {
-  assert(condition_var != NULL);
-  assert(mutex != NULL);
+  if (condition_var == NULL || mutex == NULL) {
+    return EMBB_ERROR;
+  }
   int result = pthread_cond_wait(condition_var, mutex);
   return result == 0 ? EMBB_SUCCESS : EMBB_ERROR;
 }
 
 int embb_condition_wait_until(embb_condition_t* condition_var,
                               embb_mutex_t* mutex, const embb_time_t* time) {
-  assert(condition_var != NULL);
-  assert(mutex != NULL);
-  assert(time != NULL);
+  if (condition_var == NULL || mutex == NULL || time == NULL) {
+    return EMBB_ERROR;
+  }
   /* Convert EMBB time to Unix time format */
   struct timespec unix_time;
   unix_time.tv_sec = time->seconds;
@@ -157,7 +174,9 @@ int embb_condition_wait_until(embb_condition_t* condition_var,
 }
 
 int embb_condition_destroy(embb_condition_t* condition_var) {
-  assert(condition_var != NULL);
+  if (condition_var == NULL) {
+    return EMBB_ERROR;
+  }
   int status = pthread_cond_destroy(condition_var);
   if (status != 0) {
     return EMBB_ERROR;
diff --git a/base_c/src/counter.c b/base_c/src/counter.c
index d71eb4d..5ebbe86 100644
--- a/base_c/src/counter.c
+++ b/base_c/src/counter.c
@@ -30,23 +30,31 @@
 #include <assert.h>
 
 int embb_counter_init(embb_counter_t* counter) {
-  assert(counter != NULL);
+  if (counter == NULL) {
+    return EMBB_ERROR;
+  }
   embb_atomic_store_unsigned_int(&(counter->value), 0);
   return EMBB_SUCCESS;
 }
 
 unsigned int embb_counter_get(embb_counter_t* counter) {
-  assert(counter != NULL);
+  if (counter == NULL) {
+    return EMBB_ERROR;
+  }
   return embb_atomic_load_unsigned_int(&(counter->value));
 }
 
 unsigned int embb_counter_increment(embb_counter_t* counter) {
-  assert(counter != NULL);
+  if (counter == NULL) {
+    return EMBB_ERROR;
+  }
   return embb_atomic_fetch_and_add_unsigned_int(&(counter->value), 1);
 }
 
 unsigned int embb_counter_decrement(embb_counter_t* counter) {
-  assert(counter != NULL);
+  if (counter == NULL) {
+    return EMBB_ERROR;
+  }
   return embb_atomic_fetch_and_add_unsigned_int(&(counter->value),
                                                 (unsigned int)-1);
 }
diff --git a/base_c/src/duration.c b/base_c/src/duration.c
index 8db8c7c..26a539f 100644
--- a/base_c/src/duration.c
+++ b/base_c/src/duration.c
@@ -46,7 +46,9 @@ const embb_duration_t* embb_duration_zero() {
 
 int embb_duration_set_nanoseconds(embb_duration_t* duration,
                                   unsigned long long nanoseconds) {
-  assert(duration != NULL);
+  if (duration == NULL) {
+    return EMBB_ERROR;
+  }
   if (nanoseconds > 0) {
     if (embb_duration_min()->nanoseconds > nanoseconds) {
       return EMBB_UNDERFLOW;
@@ -63,7 +65,9 @@ int embb_duration_set_nanoseconds(embb_duration_t* duration,
 
 int embb_duration_set_microseconds(embb_duration_t* duration,
                                    unsigned long long microseconds) {
-  assert(duration != NULL);
+  if (duration == NULL) {
+    return EMBB_ERROR;
+  }
   if (microseconds > 0) {
     if (embb_duration_min()->nanoseconds > microseconds*1000) {
       return EMBB_UNDERFLOW;
@@ -80,7 +84,9 @@ int embb_duration_set_microseconds(embb_duration_t* duration,
 
 int embb_duration_set_milliseconds(embb_duration_t* duration,
                                    unsigned long long milliseconds) {
-  assert(duration != NULL);
+  if (duration == NULL) {
+    return EMBB_ERROR;
+  }
   if (milliseconds > 0) {
     if (embb_duration_min()->nanoseconds > milliseconds*1000000) {
       return EMBB_UNDERFLOW;
@@ -97,7 +103,9 @@ int embb_duration_set_milliseconds(embb_duration_t* duration,
 
 int embb_duration_set_seconds(embb_duration_t* duration,
                               unsigned long long seconds) {
-  assert(duration != NULL);
+  if (duration == NULL) {
+    return EMBB_ERROR;
+  }
   if (seconds > 0) {
     if (embb_duration_min()->nanoseconds > seconds*1000000000) {
       return EMBB_UNDERFLOW;
@@ -113,8 +121,9 @@ int embb_duration_set_seconds(embb_duration_t* duration,
 }
 
 int embb_duration_add(embb_duration_t* lhs, const embb_duration_t* rhs) {
-  assert(lhs != NULL);
-  assert(rhs != NULL);
+  if (lhs == NULL || rhs == NULL) {
+    return EMBB_ERROR;
+  }
   int carry = (int)((lhs->nanoseconds + rhs->nanoseconds) / 1000000000);
   if (lhs->seconds + rhs->seconds + carry > EMBB_DURATION_MAX_SECONDS) {
     return EMBB_OVERFLOW;
@@ -126,8 +135,9 @@ int embb_duration_add(embb_duration_t* lhs, const embb_duration_t* rhs) {
 
 int embb_duration_as_nanoseconds(const embb_duration_t* duration,
                                  unsigned long long* nanoseconds) {
-  assert(duration != NULL);
-  assert(nanoseconds != NULL);
+  if (duration == NULL || nanoseconds == NULL) {
+    return EMBB_ERROR;
+  }
   if (duration->seconds*1000000000 + duration->nanoseconds > ULLONG_MAX) {
     return EMBB_OVERFLOW;
   }
@@ -137,8 +147,9 @@ int embb_duration_as_nanoseconds(const embb_duration_t* duration,
 
 int embb_duration_as_microseconds(const embb_duration_t* duration,
                                   unsigned long long* microseconds) {
-  assert(duration != NULL);
-  assert(microseconds != NULL);
+  if (duration == NULL || microseconds == NULL) {
+    return EMBB_ERROR;
+  }
   if (duration->nanoseconds % 1000 > 0) {
     return EMBB_UNDERFLOW;
   }
@@ -151,8 +162,9 @@ int embb_duration_as_microseconds(const embb_duration_t* duration,
 
 int embb_duration_as_milliseconds(const embb_duration_t* duration,
                                   unsigned long long* milliseconds) {
-  assert(duration != NULL);
-  assert(milliseconds != NULL);
+  if (duration == NULL || milliseconds == NULL) {
+    return EMBB_ERROR;
+  }
   if (duration->nanoseconds % 1000000 > 0) {
     return EMBB_UNDERFLOW;
   }
@@ -165,8 +177,9 @@ int embb_duration_as_milliseconds(const embb_duration_t* duration,
 
 int embb_duration_as_seconds(const embb_duration_t* duration,
                              unsigned long long* seconds) {
-  assert(duration != NULL);
-  assert(seconds != NULL);
+  if (duration == NULL || seconds == NULL) {
+    return EMBB_ERROR;
+  }
   if (duration->nanoseconds % 1000000000 > 0) {
     return EMBB_UNDERFLOW;
   }
@@ -180,11 +193,12 @@ int embb_duration_as_seconds(const embb_duration_t* duration,
 
 int embb_duration_compare(const embb_duration_t* lhs,
                           const embb_duration_t* rhs) {
-  assert(lhs != NULL);
-  assert(rhs != NULL);
-  assert(lhs->nanoseconds < 1000000000);
-  assert(rhs->nanoseconds < 1000000000);
-
+  if (lhs == NULL || rhs == NULL) {
+    return EMBB_ERROR;
+  }
+  if (lhs->nanoseconds >= 1000000000 || rhs->nanoseconds >= 1000000000) {
+    return EMBB_ERROR;
+  }
   if (lhs->seconds > rhs->seconds) {
     return 1;
   } else if (lhs->seconds < rhs->seconds) {
diff --git a/base_c/src/memory_allocation.c b/base_c/src/memory_allocation.c
index e1462db..7c009c0 100644
--- a/base_c/src/memory_allocation.c
+++ b/base_c/src/memory_allocation.c
@@ -62,7 +62,9 @@ void* embb_alloc(size_t bytes) {
 }
 
 void embb_free(void * ptr) {
-  assert(ptr != NULL);
+  if (ptr == NULL) {
+    return;
+  }
 
   size_t * alloc_type = (size_t*)ptr - 1;
   size_t * bytes_allocated = (size_t*)ptr - 2;
@@ -134,7 +136,10 @@ void* embb_alloc_aligned(size_t alignment, size_t size) {
 }
 
 void embb_free_aligned(void* ptr) {
-  assert(ptr != NULL);
+  if (ptr == NULL) {
+    return;
+  }
+
   size_t* ptr_conv = (size_t*)ptr;
 
   // If embb_free_aligned is called, the memory block should have been allocated
@@ -160,7 +165,10 @@ void * embb_alloc(size_t bytes) {
 }
 
 void embb_free(void * ptr) {
-  assert(ptr != NULL);
+  if (ptr == NULL) {
+    return;
+  }
+
   free(ptr);
 }
 
@@ -193,6 +201,10 @@ void *embb_alloc_aligned(size_t alignment, size_t size) {
 }
 
 void embb_free_aligned(void* ptr) {
+  if (ptr == NULL) {
+    return;
+  }
+
 #ifdef EMBB_PLATFORM_COMPILER_MSVC
   _aligned_free(ptr);
 #else
diff --git a/base_c/src/mutex.c b/base_c/src/mutex.c
index 601e16b..e1914ff 100644
--- a/base_c/src/mutex.c
+++ b/base_c/src/mutex.c
@@ -33,6 +33,9 @@
 #ifdef EMBB_PLATFORM_THREADING_WINTHREADS
 
 int embb_mutex_init(embb_mutex_t* mutex, int type) {
+  if (NULL == mutex) {
+    return EMBB_ERROR;
+  }
   /* Critical sections in Windows are always recursive */
   InitializeCriticalSection(mutex);
   EMBB_UNUSED(type);
@@ -40,11 +43,17 @@ int embb_mutex_init(embb_mutex_t* mutex, int type) {
 }
 
 int embb_mutex_lock(embb_mutex_t* mutex) {
+  if (NULL == mutex) {
+    return EMBB_ERROR;
+  }
   EnterCriticalSection(mutex);
   return EMBB_SUCCESS;
 }
 
 int embb_mutex_try_lock(embb_mutex_t* mutex) {
+  if (NULL == mutex) {
+    return EMBB_ERROR;
+  }
   BOOL success;
   success = TryEnterCriticalSection(mutex);
   if (success == FALSE) return EMBB_ERROR;
@@ -52,11 +61,17 @@ int embb_mutex_try_lock(embb_mutex_t* mutex) {
 }
 
 int embb_mutex_unlock(embb_mutex_t* mutex) {
+  if (NULL == mutex) {
+    return EMBB_ERROR;
+  }
   LeaveCriticalSection(mutex);
   return EMBB_SUCCESS;
 }
 
 void embb_mutex_destroy(embb_mutex_t* mutex) {
+  if (NULL == mutex) {
+    return;
+  }
   DeleteCriticalSection(mutex);
 }
 
@@ -65,6 +80,9 @@ void embb_mutex_destroy(embb_mutex_t* mutex) {
 #ifdef EMBB_PLATFORM_THREADING_POSIXTHREADS
 
 int embb_mutex_init(embb_mutex_t* mutex, int type) {
+  if (NULL == mutex) {
+    return EMBB_ERROR;
+  }
   if (type == EMBB_MUTEX_PLAIN) {
     if (pthread_mutex_init(mutex, NULL) != 0) return EMBB_ERROR;
   } else {
@@ -85,6 +103,9 @@ int embb_mutex_init(embb_mutex_t* mutex, int type) {
 }
 
 int embb_mutex_lock(embb_mutex_t* mutex) {
+  if (NULL == mutex) {
+    return EMBB_ERROR;
+  }
   int result = pthread_mutex_lock(mutex);
   if (result != 0) {
     return EMBB_ERROR;
@@ -93,6 +114,9 @@ int embb_mutex_lock(embb_mutex_t* mutex) {
 }
 
 int embb_mutex_try_lock(embb_mutex_t* mutex) {
+  if (NULL == mutex) {
+    return EMBB_ERROR;
+  }
   int result = pthread_mutex_trylock(mutex);
   if (result == 0) {
     return EMBB_SUCCESS;
@@ -104,6 +128,9 @@ int embb_mutex_try_lock(embb_mutex_t* mutex) {
 }
 
 int embb_mutex_unlock(embb_mutex_t* mutex) {
+  if (NULL == mutex) {
+    return EMBB_ERROR;
+  }
   int result = pthread_mutex_unlock(mutex);
   if (result != 0) {
     return EMBB_ERROR;
@@ -112,12 +139,18 @@ int embb_mutex_unlock(embb_mutex_t* mutex) {
 }
 
 void embb_mutex_destroy(embb_mutex_t* mutex) {
+  if (NULL == mutex) {
+    return;
+  }
   pthread_mutex_destroy(mutex);
 }
 
 #endif /* EMBB_PLATFORM_THREADING_POSIXTHREADS */
 
 int embb_spin_init(embb_spinlock_t* spinlock) {
+  if (NULL == spinlock) {
+    return EMBB_ERROR;
+  }
   // For now, store the initial value. In the future will use atomic init
   // function (as soon as available).
   embb_atomic_store_int(&spinlock->atomic_spin_variable_, 0);
@@ -125,6 +158,9 @@ int embb_spin_init(embb_spinlock_t* spinlock) {
 }
 
 int embb_spin_lock(embb_spinlock_t* spinlock) {
+  if (NULL == spinlock) {
+    return EMBB_ERROR;
+  }
   int expected = 0;
   int spins = 1;
 
@@ -143,6 +179,9 @@ int embb_spin_lock(embb_spinlock_t* spinlock) {
 
 int embb_spin_try_lock(embb_spinlock_t* spinlock,
   unsigned int max_number_spins) {
+  if (NULL == spinlock) {
+    return EMBB_ERROR;
+  }
   if (max_number_spins == 0)
     return EMBB_BUSY;
 
@@ -161,6 +200,9 @@ int embb_spin_try_lock(embb_spinlock_t* spinlock,
 }
 
 int embb_spin_unlock(embb_spinlock_t* spinlock) {
+  if (NULL == spinlock) {
+    return EMBB_ERROR;
+  }
   int expected = 1;
   return embb_atomic_compare_and_swap_int(&spinlock->atomic_spin_variable_,
     &expected, 0) ?
diff --git a/base_c/src/thread.c b/base_c/src/thread.c
index e7abb40..0cfddf8 100644
--- a/base_c/src/thread.c
+++ b/base_c/src/thread.c
@@ -80,7 +80,9 @@ void embb_thread_yield() {
 
 int embb_thread_create(embb_thread_t* thread, const embb_core_set_t* core_set,
                        embb_thread_start_t func, void *arg) {
-  assert(thread != NULL);
+  if (thread == NULL) {
+    return EMBB_ERROR;
+  }
   thread->embb_internal_arg = (embb_internal_thread_arg_t*)
                               embb_alloc(sizeof(embb_internal_thread_arg_t));
   if (thread->embb_internal_arg == NULL) return EMBB_NOMEM;
@@ -118,6 +120,9 @@ int embb_thread_create(embb_thread_t* thread, const embb_core_set_t* core_set,
 }
 
 int embb_thread_join(embb_thread_t* thread, int* result_code) {
+  if (thread == NULL) {
+    return EMBB_ERROR;
+  }
   BOOL success;
   DWORD result;
   result = WaitForSingleObject(thread->embb_internal_handle, INFINITE);
@@ -143,6 +148,9 @@ int embb_thread_join(embb_thread_t* thread, int* result_code) {
 }
 
 int embb_thread_equal(const embb_thread_t* lhs, const embb_thread_t* rhs) {
+  if (lhs == NULL || rhs == NULL) {
+    return 0;
+  }
   embb_thread_id_t idLhs = GetThreadId(lhs->embb_internal_handle);
   embb_thread_id_t idRhs = GetThreadId(rhs->embb_internal_handle);
   if (idLhs == idRhs) {
@@ -203,6 +211,9 @@ void embb_thread_yield() {
 
 int embb_thread_create(embb_thread_t* thread, const embb_core_set_t* core_set,
                        embb_thread_start_t func, void* arg) {
+  if (thread == NULL) {
+    return EMBB_ERROR;
+  }
   pthread_attr_t attr; /* Used to set thread affinities */
   int status = pthread_attr_init(&attr);
   if (status != 0) return EMBB_ERROR;
@@ -250,6 +261,9 @@ int embb_thread_create(embb_thread_t* thread, const embb_core_set_t* core_set,
 }
 
 int embb_thread_join(embb_thread_t* thread, int *result_code) {
+  if (thread == NULL) {
+    return EMBB_ERROR;
+  }
   int status = 0;
   status = pthread_join(thread->embb_internal_handle, NULL);
   if (result_code != NULL) {
@@ -263,6 +277,9 @@ int embb_thread_join(embb_thread_t* thread, int *result_code) {
 }
 
 int embb_thread_equal(const embb_thread_t* lhs, const embb_thread_t* rhs) {
+  if (lhs == NULL || rhs == NULL) {
+    return 0;
+  }
   return pthread_equal(lhs->embb_internal_handle, rhs->embb_internal_handle);
 }
 
diff --git a/base_c/src/thread_specific_storage.c b/base_c/src/thread_specific_storage.c
index fea5d18..1b6e563 100644
--- a/base_c/src/thread_specific_storage.c
+++ b/base_c/src/thread_specific_storage.c
@@ -32,7 +32,9 @@
 #include <assert.h>
 
 int embb_tss_create(embb_tss_t* tss) {
-  assert(tss != NULL);
+  if (tss == NULL) {
+    return EMBB_ERROR;
+  }
   tss->size = embb_thread_get_max_count();
   tss->values = (void**) embb_alloc_cache_aligned(tss->size * sizeof(void*));
   if (tss->values == NULL) {
@@ -45,7 +47,9 @@ int embb_tss_create(embb_tss_t* tss) {
 }
 
 int embb_tss_set(embb_tss_t* tss, void* value) {
-  assert(tss != NULL);
+  if (tss == NULL) {
+    return EMBB_ERROR;
+  }
   unsigned int index = 0;
   int status = embb_internal_thread_index(&index);
   if ((status != EMBB_SUCCESS) || (index >= tss->size)) {
@@ -56,8 +60,12 @@ int embb_tss_set(embb_tss_t* tss, void* value) {
 }
 
 void* embb_tss_get(const embb_tss_t* tss) {
-  assert(tss != NULL);
-  assert(tss->values != NULL);
+  if (tss == NULL) {
+    return NULL;
+  }
+  if (tss->values == NULL) {
+    return NULL;
+  }
   unsigned int index = 0;
   int status = embb_internal_thread_index(&index);
   if ((status != EMBB_SUCCESS) || (index >= tss->size)) {
@@ -67,6 +75,8 @@ void* embb_tss_get(const embb_tss_t* tss) {
 }
 
 void embb_tss_delete(embb_tss_t* tss) {
-  assert(tss != NULL);
+  if (tss == NULL) {
+    return;
+  }
   embb_free_aligned(tss->values);
 }
diff --git a/base_c/src/time.c b/base_c/src/time.c
index bc92363..93e979b 100644
--- a/base_c/src/time.c
+++ b/base_c/src/time.c
@@ -33,10 +33,12 @@ void embb_time_now(embb_time_t* time) {
 }
 
 int embb_time_compare(const embb_time_t* lhs, const embb_time_t* rhs) {
-  assert(lhs != NULL);
-  assert(rhs != NULL);
-  assert(lhs->nanoseconds < 1000000000);
-  assert(rhs->nanoseconds < 1000000000);
+  if (lhs == NULL || rhs == NULL) {
+    return EMBB_ERROR;
+  }
+  if (lhs->nanoseconds >= 1000000000 || rhs->nanoseconds >= 1000000000) {
+    return EMBB_ERROR;
+  }
 
   if (lhs->seconds > rhs->seconds) {
     return 1;
@@ -56,8 +58,9 @@ int embb_time_compare(const embb_time_t* lhs, const embb_time_t* rhs) {
 #ifdef EMBB_PLATFORM_THREADING_WINTHREADS
 
 int embb_time_in(embb_time_t* time, const embb_duration_t* duration) {
-  assert(time != NULL);
-  assert(duration != NULL);
+  if (time == NULL || duration == NULL) {
+    return EMBB_ERROR;
+  }
   /* Get system time */
   SYSTEMTIME system_time;
   GetLocalTime(&system_time);
@@ -87,8 +90,9 @@ int embb_time_in(embb_time_t* time, const embb_duration_t* duration) {
 #ifdef EMBB_PLATFORM_THREADING_POSIXTHREADS
 
 int embb_time_in(embb_time_t* time, const embb_duration_t* duration) {
-  assert(time != NULL);
-  assert(duration != NULL);
+  if (time == NULL || duration == NULL) {
+    return EMBB_ERROR;
+  }
   struct timespec unix_time;
   clock_gettime(CLOCK_REALTIME, &unix_time);
   time->seconds = unix_time.tv_sec;