base_c: added function to set thread priority, implemented for windows only for now

base_c/include/embb/base/c/thread.h

@@ -56,6 +56,16 @@ extern "C" {
 typedef opaque_type embb_thread_t;
 #endif /* DOXYGEN */
 
+typedef enum {
+  EMBB_THREAD_PRIORITY_IDLE,
+  EMBB_THREAD_PRIORITY_LOWEST,
+  EMBB_THREAD_PRIORITY_BELOW_NORMAL,
+  EMBB_THREAD_PRIORITY_NORMAL,
+  EMBB_THREAD_PRIORITY_ABOVE_NORMAL,
+  EMBB_THREAD_PRIORITY_HIGHEST,
+  EMBB_THREAD_PRIORITY_TIME_CRITICAL
+} embb_thread_priority_t;
+
 /**
  * Thread start function pointer type.
  *
@@ -180,6 +190,11 @@ int embb_thread_equal(
   /**< [IN] Second thread (right-hand side of equality sign) */
   );
 
+int embb_thread_set_priority(
+  embb_thread_t* thread,
+  embb_thread_priority_t priority
+  );
+
 #ifdef __cplusplus
 } /* Close extern "C" { */
 #endif

base_c/src/thread.c

@@ -164,6 +164,43 @@ int embb_thread_equal(const embb_thread_t* lhs, const embb_thread_t* rhs) {
   return 0;
 }
 
+int embb_thread_set_priority(
+  embb_thread_t* thread,
+  embb_thread_priority_t priority
+) {
+  int internal_priority;
+  switch (priority) {
+  case EMBB_THREAD_PRIORITY_IDLE:
+    internal_priority = THREAD_PRIORITY_IDLE;
+    break;
+  case EMBB_THREAD_PRIORITY_LOWEST:
+    internal_priority = THREAD_PRIORITY_LOWEST;
+    break;
+  case EMBB_THREAD_PRIORITY_BELOW_NORMAL:
+    internal_priority = THREAD_PRIORITY_BELOW_NORMAL;
+    break;
+  case EMBB_THREAD_PRIORITY_ABOVE_NORMAL:
+    internal_priority = THREAD_PRIORITY_ABOVE_NORMAL;
+    break;
+  case EMBB_THREAD_PRIORITY_HIGHEST:
+    internal_priority = THREAD_PRIORITY_HIGHEST;
+    break;
+  case EMBB_THREAD_PRIORITY_TIME_CRITICAL:
+    internal_priority = THREAD_PRIORITY_TIME_CRITICAL;
+    break;
+  case EMBB_THREAD_PRIORITY_NORMAL:
+  default:
+    internal_priority = THREAD_PRIORITY_NORMAL;
+    break;
+  }
+  BOOL result = SetThreadPriority(thread->embb_internal_handle, internal_priority);
+  if (result != 0) {
+    return EMBB_SUCCESS;
+  } else {
+    return EMBB_ERROR;
+  }
+}
+
 #endif /* EMBB_PLATFORM_THREADING_WINTHREADS */
 
 #ifdef EMBB_PLATFORM_THREADING_POSIXTHREADS
@@ -299,4 +336,12 @@ int embb_thread_equal(const embb_thread_t* lhs, const embb_thread_t* rhs) {
   return pthread_equal(lhs->embb_internal_handle, rhs->embb_internal_handle);
 }
 
+int embb_thread_set_priority(
+  embb_thread_t* /*thread*/,
+  embb_thread_priority_t /*priority*/
+) {
+  // not implemented yet
+  return EMBB_ERROR;
+}
+
 #endif /* EMBB_PLATFORM_THREADING_POSIXTHREADS */