From 3efe00a7d0c895c2bee68f4f6a0bc12cb1be3299 Mon Sep 17 00:00:00 2001
From: hadaq <hadaq>
Date: Tue, 18 Aug 2009 15:47:37 +0000
Subject: [PATCH] iextern variable unsigned int trb_semlock = 0 inhibits
 semaphore-locking of FPGA .

---
 libtrbnet/trbcmd.c |  3 ++-
 libtrbnet/trbnet.c | 25 ++++++++++++++++---------
 libtrbnet/trbnet.h |  4 +---
 3 files changed, 19 insertions(+), 13 deletions(-)

diff --git a/libtrbnet/trbcmd.c b/libtrbnet/trbcmd.c
index f38a5e9..c9499f8 100644
--- a/libtrbnet/trbcmd.c
+++ b/libtrbnet/trbcmd.c
@@ -15,7 +15,7 @@
 #define HEXMODE 0
 #endif
 
-#define VERSION_NUMBER "2.03 20090813"
+#define VERSION_NUMBER "2.04 20090818"
 
 static int hexMode = HEXMODE;
 
@@ -80,6 +80,7 @@ int main(int argc, char ** argv)
   
   trb_debug = 0;
   trb_lazy = 0;
+  trb_semlock = 1;
 
   /* Parse Arguments */
   while ((opt = getopt(argc, argv, "+hf:n:d:DlHV")) != -1) {
diff --git a/libtrbnet/trbnet.c b/libtrbnet/trbnet.c
index ab9e7a1..3ab3ed2 100644
--- a/libtrbnet/trbnet.c
+++ b/libtrbnet/trbnet.c
@@ -140,6 +140,7 @@ static const key_t sem_key = 0x545242;
 unsigned int trb_debug = 0;
 unsigned int trb_lazy = 0;
 unsigned int trb_dma = 0;
+unsigned int trb_semlock = 0;
 
 /* Declaration of a TRB-Package */
 
@@ -848,9 +849,11 @@ static int lockPorts()
       SEM_UNDO | IPC_NOWAIT /* sem_flg: remove sem if process gets killed   */
     }
   };
-
+  
+  if (trb_semlock == 0) return 0;
+  
   if (semop(semid, sops, 2) == -1) {
-    perror("TRB_SEMAPHORE");
+    perror("TRB_SEMAPHORE lock");
     trb_errno = TRB_SEMAPHORE;
     return -1;
   }
@@ -868,12 +871,14 @@ static int unlockPorts()
     }
   };
   
+  if (trb_semlock == 0) return 0;
+  
   if (semop(semid, sops, 1) == -1) {
-    perror("TRB_SEMAPHORE");
+    perror("TRB_SEMAPHORE unlock");
     trb_errno = TRB_SEMAPHORE;
     return -1;
   }
-
+  
   return 0;
 }
 
@@ -892,11 +897,13 @@ int init_ports()
     /* Set trberrno ?? */
     return -1;
   }
-  
-  /* Get / Create semaphore */
-  if ((semid = semget(sem_key, 1, IPC_CREAT | 0666)) == -1) {
-    trb_errno = TRB_SEMAPHORE;
-    return -1;
+
+  /* Get / Create semaphore */  
+  if (trb_semlock > 0) {
+    if ((semid = semget(sem_key, 1, IPC_CREAT | 0666)) == -1) {
+      trb_errno = TRB_SEMAPHORE;
+      return -1;
+    }
   }
   
   return 0;
diff --git a/libtrbnet/trbnet.h b/libtrbnet/trbnet.h
index 7661dc9..effdf63 100644
--- a/libtrbnet/trbnet.h
+++ b/libtrbnet/trbnet.h
@@ -6,6 +6,7 @@
 extern unsigned int trb_debug;
 extern unsigned int trb_lazy;
 extern unsigned int trb_dma;
+extern unsigned int trb_semlock;
 
 /* ---------------------------------------------------------------------- */
 
@@ -220,9 +221,6 @@ int trb_fifo_flush(uint8_t channel);
                        uint8_t info,
                        uint8_t random,
                        uint16_t number);
-
-
-
 */
 
 #endif
-- 
2.43.0