core: add some more memory logging helper defines to mem.h

- add some more memory logging helper defines to mem.h
- PKG_MEM_CRITICAL: output a generic pkg error message with log level critical
- SHM_MEM_CRITICAL: output a generic shm error message with log level critical
- SYS_MEM_ERROR/SYS_MEM_CRITICAL: generic error message for system allocation

src/core/mem/mem.h

@@ -195,10 +195,18 @@ int init_shm_mallocs(int force_alloc);
 /** generic logging helper for allocation errors in private memory pool/ system */
 #ifdef SYS_MALLOC
 #define PKG_MEM_ERROR LM_ERR("could not allocate private memory from sys pool\n")
+#define PKG_MEM_CRITICAL LM_CRIT("could not allocate private memory from sys pool\n")
 #else
 #define PKG_MEM_ERROR LM_ERR("could not allocate private memory from pkg pool\n")
+#define PKG_MEM_CRITICAL LM_CRIT("could not allocate private memory from pkg pool\n")
 #endif
+
+/** generic logging helper for allocation errors in system memory */
+#define SYS_MEM_ERROR LM_ERR("could not allocate memory from system\n")
+#define SYS_MEM_CRITICAL LM_CRIT("could not allocate memory from system\n")
+
 /** generic logging helper for allocation errors in shared memory pool */
 #define SHM_MEM_ERROR LM_ERR("could not allocate shared memory from shm pool\n")
+#define SHM_MEM_CRITICAL LM_CRIT("could not allocate shared memory from shm pool\n")
 
 #endif