lib: Change invalid pid to -1

The stack used pid 0 (the scheduler) to indicate an invalid process
instance, probably as a leftover from the deprecated application
process instance id. Using -1 is a better solution.

Fixes #16.

1 files changed, 3 insertions, 3 deletions

diff --git a/src/lib/dev.c b/src/lib/dev.c
index 19bc90e5..d85afc45 100644
--- a/src/lib/dev.c
+++ b/src/lib/dev.c
@@ -93,7 +93,7 @@ int ap_init(char * ap_name)
         for (i = 0; i < AP_MAX_FLOWS; ++i) {
                 _ap_instance->flows[i].rb = NULL;
                 _ap_instance->flows[i].port_id = -1;
-                _ap_instance->flows[i].api = 0; /* API_INVALID */
+                _ap_instance->flows[i].api = -1;
         }
 
         pthread_rwlock_init(&_ap_instance->flows_lock, NULL);
@@ -397,7 +397,7 @@ int flow_dealloc(int fd)
         _ap_instance->flows[fd].port_id = -1;
         shm_ap_rbuff_close(_ap_instance->flows[fd].rb);
         _ap_instance->flows[fd].rb = NULL;
-        _ap_instance->flows[fd].api = 0;
+        _ap_instance->flows[fd].api = -1;
 
         bmp_release(_ap_instance->fds, fd);
 
@@ -543,7 +543,7 @@ ssize_t flow_read(int fd, void * buf, size_t count)
 
         if (_ap_instance->flows[fd].oflags & FLOW_O_NONBLOCK) {
                 idx = shm_ap_rbuff_read_port(_ap_instance->rb,
-                                           _ap_instance->flows[fd].port_id);
+                                             _ap_instance->flows[fd].port_id);
         } else { /* block */
                 while ((idx =
                         shm_ap_rbuff_read_port(_ap_instance->rb,