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-rw-r--r--os/kernel/include/mailboxes.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/os/kernel/include/mailboxes.h b/os/kernel/include/mailboxes.h
index 9e795590b..959d1ce37 100644
--- a/os/kernel/include/mailboxes.h
+++ b/os/kernel/include/mailboxes.h
@@ -29,6 +29,13 @@
#if CH_USE_MAILBOXES
+/*
+ * Module dependancies check.
+ */
+#if !CH_USE_SEMAPHORES
+#error "CH_USE_MAILBOXES requires CH_USE_SEMAPHORES"
+#endif
+
typedef struct {
msg_t *mb_buffer; /**< Pointer to the mailbox buffer.*/
msg_t *mb_top; /**< Pointer to the first location