remove T_USE_SHARED_MEMORY

The T only works when it's TRUE, the version without shared memory
is not supported anymore.

cmake_targets/CMakeLists.txt

@@ -1487,7 +1487,6 @@ set(CMAKE_MODULE_PATH "${OPENAIR_DIR}/cmake_targets/tools/MODULES" "${CMAKE_MODU
 #add the T tracer
 add_boolean_option(T_TRACER True "Activate the T tracer" )
 include_directories("${OPENAIR_DIR}/common/utils/T")
-add_boolean_option(T_USE_SHARED_MEMORY True "Use shared memory to communicate with the T tracer" )
 set(T_SOURCE
     ${OPENAIR_DIR}/common/utils/T/T.c)
 set (T_LIB "-lrt")

common/utils/T/Makefile

 CC=gcc
 CFLAGS=-Wall -g -pthread -DT_TRACER
 
-#comment those two lines to NOT use shared memory
-CFLAGS += -DT_USE_SHARED_MEMORY
 LIBS += -lrt
 
 PROG=t

common/utils/T/T.c

@@ -62,42 +62,6 @@ printf("got mess %d\n", t);
   }
 }
 
-#ifndef T_USE_SHARED_MEMORY
-
-static void *T_send_thread(void *_)
-{
-  while (1) {
-    usleep(5000);
-    __sync_synchronize();
-    while (T_cache[T_busylist_head].busy) {
-      char *b;
-      int l;
-      /* TODO: be sure about those memory barriers - in doubt one is
-       * put here too
-       */
-      __sync_synchronize();
-      b = T_cache[T_busylist_head].buffer;
-      l = T_cache[T_busylist_head].length;
-      while (l) {
-        int done = write(T_socket, b, l);
-        if (done <= 0) {
-          printf("%s:%d:%s: error sending to socket\n",
-                 __FILE__, __LINE__, __FUNCTION__);
-          abort();
-        }
-        b += done;
-        l -= done;
-      }
-      T_cache[T_busylist_head].busy = 0;
-      T_busylist_head++;
-      T_busylist_head &= T_CACHE_SIZE - 1;
-    }
-  }
-  return NULL;
-}
-
-#endif /* T_USE_SHARED_MEMORY */
-
 static void *T_receive_thread(void *_)
 {
   while (1) get_message(T_socket);
@@ -123,9 +87,7 @@ void T_connect_to_tracer(char *addr, int port)
 {
   struct sockaddr_in a;
   int s;
-#ifdef T_USE_SHARED_MEMORY
   int T_shm_fd;
-#endif
   unsigned char *buf;
   int len;
 
@@ -156,7 +118,6 @@ again:
 
   T_socket = s;
 
-#ifdef T_USE_SHARED_MEMORY
   /* setup shared memory */
   T_shm_fd = shm_open(T_SHM_FILENAME, O_RDWR /*| O_SYNC*/, 0666);
   shm_unlink(T_SHM_FILENAME);
@@ -166,11 +127,7 @@ again:
   if (T_cache == NULL)
     { perror(T_SHM_FILENAME); abort(); }
   close(T_shm_fd);
-#endif
 
-#ifndef T_USE_SHARED_MEMORY
-  new_thread(T_send_thread, NULL);
-#endif
   new_thread(T_receive_thread, NULL);
 
   /* trace T_message.txt

common/utils/T/T.h

@@ -127,26 +127,12 @@ extern T_cache_t *T_cache;
 
 #define T_ACTIVE(x) T_active[(intptr_t)x]
 
-#ifdef T_USE_SHARED_MEMORY
-
 #define T_SEND() \
   T_cache[T_LOCAL_slot].length = T_LOCAL_size; \
   __sync_synchronize(); \
   T_cache[T_LOCAL_slot].busy = 1; \
   T_send(T_LOCAL_buf, T_LOCAL_size)
 
-#else /* T_USE_SHARED_MEMORY */
-
-/* when not using shared memory, wait for send to finish */
-#define T_SEND() \
-  T_cache[T_LOCAL_slot].length = T_LOCAL_size; \
-  __sync_synchronize(); \
-  T_cache[T_LOCAL_slot].busy = 1; \
-  T_send(T_LOCAL_buf, T_LOCAL_size); \
-  while (T_cache[T_LOCAL_slot].busy) usleep(1*1000)
-
-#endif /* T_USE_SHARED_MEMORY */
-
 #define T_CHECK_SIZE(len, argnum) \
   if (T_LOCAL_size + (len) > T_BUFFER_MAX) { \
     printf("%s:%d:%s: cannot put argument %d in T macro, not enough space" \
@@ -575,26 +561,8 @@ extern T_cache_t *T_cache;
     } \
   } while (0)
 
-#ifndef T_USE_SHARED_MEMORY
-
-#include <stdio.h>
-
-static inline void T_send(char *buf, int size)
-{
-  int i;
-return;
-  printf("sending %d bytes", size);
-  for (i = 0; i < size; i++)
-    printf("%s%2.2x", i?" ":"\n", (unsigned char)buf[i]);
-  printf("\n");
-}
-
-#else /* T_USE_SHARED_MEMORY */
-
 #define T_send(...) /**/
 
-#endif /* T_USE_SHARED_MEMORY */
-
 extern int *T_active;
 
 void T_connect_to_tracer(char *addr, int port);

common/utils/T/tracee/Makefile

 CC=gcc
-CFLAGS=-Wall -g -pthread -DT_TRACER -DT_USE_SHARED_MEMORY -I.
+CFLAGS=-Wall -g -pthread -DT_TRACER -I.
 
 PROG=tracee
 OBJS=tracee.o ../T.o

common/utils/T/tracer/Makefile.local

@@ -3,7 +3,6 @@ CFLAGS=-Wall -g -pthread -DT_TRACER
 
 #CFLAGS += -O3 -ffast-math -fomit-frame-pointer
 
-CFLAGS += -DT_USE_SHARED_MEMORY
 LIBS += -lrt
 
 PROG=tracer_local