From: Matthias Kruk <m@m10k.eu>
Date: Mon, 25 Nov 2019 05:43:17 +0000 (+0900)
Subject: Protect processes with a spinlock
X-Git-Url: https://git.corax.cc/?a=commitdiff_plain;h=505138cc46f6e2c0fabe03e98206ad6877709185;p=corax

Protect processes with a spinlock
---

diff --git a/kernel/core/process.c b/kernel/core/process.c
index 784a7a5..d1f223f 100644
--- a/kernel/core/process.c
+++ b/kernel/core/process.c
@@ -8,6 +8,7 @@
 #include <process.h>
 #include <signal.h>
 #include <string.h>
+#include <spinlock.h>
 #include "fd.h"
 #include "sched.h"
 
@@ -26,6 +27,8 @@ struct process {
 	uid_t          p_uid;
 	gid_t          p_gid;
 
+	spinlock_t     p_lock;
+
 	struct {
 		struct cxmsg *msg;
 		pid_t        sender;
@@ -439,6 +442,17 @@ int process_switch(process_t *proc)
 	return(ret_val);
 }
 
+void process_lock(process_t *proc)
+{
+	spinlock_lock(&(proc->p_lock));
+	return;
+}
+
+int process_unlock(process_t *proc)
+{
+	return(spinlock_unlock(&(proc->p_lock)));
+}
+
 process_t* process_get_current(void)
 {
 	process_t *ret_val;
diff --git a/kernel/include/process.h b/kernel/include/process.h
index b3a8a96..ffbfc24 100644
--- a/kernel/include/process.h
+++ b/kernel/include/process.h
@@ -31,6 +31,9 @@ typedef struct process process_t;
 int process_create(process_t**, pid_t, u32_t, void*);
 int process_switch(process_t*);
 
+void process_lock(process_t*);
+int  process_unlock(process_t*);
+
 process_t* process_get_current(void);
 process_t* process_lookup(pid_t);