Change the naming convention of shared mem segments

pyproject.toml

@@ -10,13 +10,14 @@ readme = "README.md"
 maintainers = [
     { name = "Theodore Kisner", email = "tskisner.public@gmail.com" },
 ]
+license = "BSD-2-Clause"
+license-files = ["LICENSE"]
 requires-python = ">=3.10"
 dependencies = [
   "numpy",
 ]
 classifiers = [
     "Development Status :: 5 - Production/Stable",
-    "License :: OSI Approved :: BSD License",
     "Programming Language :: Python",
     "Programming Language :: Python :: 3",
     "Programming Language :: Python :: 3.10",

src/pshmem/registry.py

@@ -62,6 +62,8 @@ def _register_signals():
     signal.signal(signal.SIGTERM, _signal_handler)
     signal.signal(signal.SIGQUIT, _signal_handler)
     signal.signal(signal.SIGHUP, _signal_handler)
+    signal.signal(signal.SIGABRT, _signal_handler)
+    signal.signal(signal.SIGSEGV, _signal_handler)
 
 
 # Register signal handlers on import

src/pshmem/shmem.py

@@ -12,7 +12,7 @@
 from .utils import (
     SharedMemory,
     mpi_data_type,
-    random_shm_key,
+    random_shm_name,
 )
 
 
@@ -151,12 +151,9 @@ def __init__(self, shape, dtype, comm, comm_node=None, comm_node_rank=None):
         self._name = None
         self._shm_index = None
         if self._rank == 0:
-            # Get a random 64bit integer between the supported range of keys
-            self._shm_index = random_shm_key()
             # Name, used as global tag.
-            self._name = f"MPIShared_{self._shm_index}"
+            self._name = random_shm_name()
         if self._comm is not None:
-            self._shm_index = self._comm.bcast(self._shm_index, root=0)
             self._name = self._comm.bcast(self._name, root=0)
 
         # Only allocate our buffers if the total number of elements is > 0

src/pshmem/utils.py

@@ -4,7 +4,7 @@
 # LICENSE file.
 ##
 
-import random
+import secrets
 import sys
 import threading
 import time
@@ -96,21 +96,22 @@ def mpi_data_type(comm, dt):
     return (dsize, mpitype)
 
 
-def random_shm_key():
-    """Get a random positive integer for using in shared memory naming.
+def random_shm_name():
+    """Get a random string for use in shared memory naming.
 
-    The python random library is used, and seeded with the default source
-    (either system time or os.urandom).
+    The naming convention used is similar to the syntax in
+    multiprocessing.shared_memory.SharedMemory.
 
     Returns:
-        (int):  The random integer.
+        (str):  The random name.
 
     """
-    min_val = 0
-    max_val = sys.maxsize
-    # Seed with default source of randomness
-    random.seed(a=None)
-    return random.randint(min_val, max_val)
+    # Copy the conventions used in python SharedMemory
+    prefix = "psm_"
+    rnbytes = 4 # 14 byte limit on BSD, minus prefix, minus slash, minus termination
+    hex = secrets.token_hex(rnbytes)
+    name = f"{prefix}{hex}"
+    return name
 
 
 @contextmanager