rt iocopyarea for ATv, DTv and Sv, and time and string locks

src/lib/rt/src/rt_lck.c

+/* 
+ * Proview   Open Source Process Control.
+ * Copyright (C) 2005-2017 SSAB EMEA AB.
+ *
+ * This file is part of Proview.
+ *
+ * This program is free software; you can redistribute it and/or 
+ * modify it under the terms of the GNU General Public License as 
+ * published by the Free Software Foundation, either version 2 of 
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful 
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of 
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License 
+ * along with Proview. If not, see <http://www.gnu.org/licenses/>
+ *
+ * Linking Proview statically or dynamically with other modules is
+ * making a combined work based on Proview. Thus, the terms and 
+ * conditions of the GNU General Public License cover the whole 
+ * combination.
+ *
+ * In addition, as a special exception, the copyright holders of
+ * Proview give you permission to, from the build function in the
+ * Proview Configurator, combine Proview with modules generated by the
+ * Proview PLC Editor to a PLC program, regardless of the license
+ * terms of these modules. You may copy and distribute the resulting
+ * combined work under the terms of your choice, provided that every 
+ * copy of the combined work is accompanied by a complete copy of 
+ * the source code of Proview (the version used to produce the 
+ * combined work), being distributed under the terms of the GNU 
+ * General Public License plus this exception.
+ */
+
+#include <string.h>
+#include <unistd.h>
+#include <sys/ipc.h>
+#include <sys/shm.h>
+
+#include "pwr.h"
+#include "co_time.h"
+#include "rt_gdh.h"
+#include "rt_sect.h"
+#include "rt_lck.h"
+
+static char lck_cName[lck_eLock__][40] = {
+  "/tmp/pwr_nmps_lock",
+  "/tmp/pwr_time_lock",
+  "/tmp/pwr_str_lock"
+};
+
+sect_sHead *lck_locksect[lck_eLock__] = { 0, 0};
+
+void lck_Create( pwr_tStatus *sts, lck_eLock lock)
+{
+  pwr_tBoolean created;
+  
+  if ( lock >= lck_eLock__ || lck_locksect[lock]) {
+    *sts = 0;
+    return;
+  }
+
+  lck_locksect[lock] = sect_Alloc( sts, &created, 0, sizeof(sect_sMutex), 
+				      lck_cName[lock], sect_mFlags_Create);
+  if ( ODD(*sts) && created)
+    sect_InitLock( sts, lck_locksect[lock], (sect_sMutex *)lck_locksect[lock]->base);
+}
+
+void lck_Unlink( pwr_tStatus *sts, lck_eLock lock)
+{
+  if ( lock >= lck_eLock__ || !lck_locksect[lock]) {
+    *sts = 0;
+    return;
+  }
+
+  if ( shmdt( lck_locksect[lock]) == -1)
+    *sts = 0;
+  else
+    *sts = 1;
+}
+
+void lck_Delete( pwr_tStatus *sts, lck_eLock lock)
+{
+  if ( lock >= lck_eLock__ || !lck_locksect[lock]) {
+    *sts = 0;
+    return;
+  }
+
+  char   segname[128];
+  char	 busid[8];
+  char   *str = getenv(pwr_dEnvBusId);
+  key_t  key;
+  int    shm_id;
+  struct shmid_ds   ds;
+
+  strncpy( busid, (str ? str : "XXX"), 3);
+  busid[3] = '\0';
+
+  sprintf(segname, "%s_%.3s", lck_cName[lock], busid);
+
+  key    = ftok(segname, 'P');
+  shm_id = shmget(key, 0, 0660);
+  if ( shmdt( lck_locksect[lock]->base) == -1)
+    printf( "Detach of timesig lock failed\n");
+  if ( shmctl(shm_id, IPC_RMID, &ds) == -1)
+    printf( "Remove of timesig lock failed\n");
+  // unlink(segname);
+  posix_sem_unlink(segname);
+  sect_Free( sts, lck_locksect[lock]);
+}
+

src/lib/rt/src/rt_lck.h

+/* 
+ * Proview   Open Source Process Control.
+ * Copyright (C) 2005-2017 SSAB EMEA AB.
+ *
+ * This file is part of Proview.
+ *
+ * This program is free software; you can redistribute it and/or 
+ * modify it under the terms of the GNU General Public License as 
+ * published by the Free Software Foundation, either version 2 of 
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful 
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of 
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License 
+ * along with Proview. If not, see <http://www.gnu.org/licenses/>
+ *
+ * Linking Proview statically or dynamically with other modules is
+ * making a combined work based on Proview. Thus, the terms and 
+ * conditions of the GNU General Public License cover the whole 
+ * combination.
+ *
+ * In addition, as a special exception, the copyright holders of
+ * Proview give you permission to, from the build function in the
+ * Proview Configurator, combine Proview with modules generated by the
+ * Proview PLC Editor to a PLC program, regardless of the license
+ * terms of these modules. You may copy and distribute the resulting
+ * combined work under the terms of your choice, provided that every 
+ * copy of the combined work is accompanied by a complete copy of 
+ * the source code of Proview (the version used to produce the 
+ * combined work), being distributed under the terms of the GNU 
+ * General Public License plus this exception.
+ */
+
+#ifndef	rt_timesig_lock_h
+#define rt_timesig_lock_h
+
+#if defined __cplusplus
+extern "C" {
+#endif
+
+#include "pwr.h"
+#include "rt_sect.h"
+
+typedef enum {
+  lck_eLock_NMps,
+  lck_eLock_Time,
+  lck_eLock_Str,
+  lck_eLock__
+} lck_eLock;
+
+#define lck_Lock(lock) sect_Lock( NULL, lck_locksect[lock], (sect_sMutex *)lck_locksect[lock]->base);
+#define lck_Unlock(lock) sect_Unlock( NULL, lck_locksect[lock], (sect_sMutex *)lck_locksect[lock]->base);
+
+#define lck_LockNMps lck_Lock(lck_eLock_NMps)
+#define lck_UnlockNMps lck_Unlock(lck_eLock_NMps)
+#define lck_LockTime lck_Lock(lck_eLock_Time)
+#define lck_UnlockTime lck_Unlock(lck_eLock_Time)
+#define lck_LockStr lck_Lock(lck_eLock_Str)
+#define lck_UnlockStr lck_Unlock(lck_eLock_Str)
+
+
+extern sect_sHead *lck_locksect[lck_eLock__];
+
+void lck_Create( pwr_tStatus *sts, lck_eLock lock);
+void lck_Delete( pwr_tStatus *sts, lck_eLock lock);
+void lck_Unlink( pwr_tStatus *sts, lck_eLock lock);
+
+
+#if defined __cplusplus
+}
+#endif
+#endif