From a29f40e073a0308bd74f0f9803a4660aa233c3ab Mon Sep 17 00:00:00 2001
From: Christian Cunningham <cc@localhost>
Date: Sat, 12 Mar 2022 16:39:39 -0800
Subject: "Dynamic" Mutex Allocation
---
src/util/lock.c | 1 +
src/util/mutex.c | 26 ++++++++++++++++++++++++++
2 files changed, 27 insertions(+)
(limited to 'src/util')
diff --git a/src/util/lock.c b/src/util/lock.c
index 95f93af..eaeb5a8 100644
--- a/src/util/lock.c
+++ b/src/util/lock.c
@@ -1,5 +1,6 @@
#include <cpu.h>
#include <cpu/atomic/swap.h>
+#include <util/mutex.h>
#include <util/lock.h>
// TODO: Improve locking for system
diff --git a/src/util/mutex.c b/src/util/mutex.c
index e69de29..3171501 100644
--- a/src/util/mutex.c
+++ b/src/util/mutex.c
@@ -0,0 +1,26 @@
+#include <util/mutex.h>
+#include <globals.h>
+
+struct Mutex* create_mutex(void* addr)
+{
+ for (unsigned long m = 0; m < MAX_MUTEXS; m++) {
+ if (mutex_table[m] == 0) {
+ mutex_table[m] = (unsigned long)addr;
+ mutexs[m].pid = 0;
+ mutexs[m].addr = addr;
+ return &mutexs[m];
+ }
+ }
+ return 0;
+}
+
+unsigned char delete_mutex(struct Mutex* m)
+{
+ for (unsigned long i = 0; i < MAX_MUTEXS; i++) {
+ if (mutex_table[i] == (unsigned long)m->addr) {
+ mutex_table[i] = 0;
+ return 0;
+ }
+ }
+ return 1;
+}
--
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