Init repository

1 files changed, 25 insertions, 0 deletions

diff --git a/src/libs/lock.c b/src/libs/lock.c
new file mode 100644
index 0000000..7b65a69
--- /dev/null
+++ b/src/libs/lock.c
@@ -0,0 +1,25 @@
+#include "lock.h"
+#include "utils.h"
+#include "addrmap.h"
+#include "time.h"
+
+char locks_pool[LOCKS_POOL_SIZE]; // Automatically zeroed (.bss)
+
+void lock_acquire(int lockid) {
+  while(1){
+	while(locks_pool[lockid]) {} // Lurking stage
+	while(!REG_READ(HARDWARE_LOCK)){} // Acquire HW lock
+	if(!locks_pool[lockid]){
+	  locks_pool[lockid]=1; // Acquire the lock
+	  REG_WRITE(HARDWARE_LOCK,0); // Release HW lock
+	  break;
+	}
+	REG_WRITE(HARDWARE_LOCK,0);
+  }
+}
+
+void lock_release(int lockid) {
+  while(!REG_READ(HARDWARE_LOCK)){}
+  locks_pool[lockid]=0;
+  REG_WRITE(HARDWARE_LOCK,0);
+}