Move prefork, postfork, and thread-exit hooks into subsys

So far, crypto is the only module that uses them, but others are
likely to do so in the future.

2 files changed, 19 insertions, 0 deletions

diff --git a/src/lib/crypt_ops/crypto_init.c b/src/lib/crypt_ops/crypto_init.c
index cc7865ef72..a03f5eff7c 100644
--- a/src/lib/crypt_ops/crypto_init.c
+++ b/src/lib/crypt_ops/crypto_init.c
@@ -227,4 +227,7 @@ const struct subsys_fns_t sys_crypto = {
   .level = -60,
   .initialize = init_crypto_sys,
   .shutdown = shutdown_crypto_sys,
+  .prefork = crypto_prefork,
+  .postfork = crypto_postfork,
+  .thread_cleanup = crypto_thread_cleanup,
 };
diff --git a/src/lib/subsys/subsys.h b/src/lib/subsys/subsys.h
index 25451bc450..b06d67e624 100644
--- a/src/lib/subsys/subsys.h
+++ b/src/lib/subsys/subsys.h
@@ -54,6 +54,22 @@ typedef struct subsys_fns_t {
   int (*add_pubsub)(struct dispatch_connector_t *);
 
   /**
+   * Perform any necessary pre-fork cleanup.  This function may not fail.
+   */
+  void (*prefork)(void);
+
+  /**
+   * Perform any necessary post-fork setup. This function may not fail.
+   */
+  void (*postfork)(void);
+
+  /**
+   * Free any thread-local resources held by this subsystem. Called before
+   * the thread exits.
+   */
+  void (*thread_cleanup)(void);
+
+  /**
    * Free all resources held by this subsystem.
    *
    * This function is not allowed to fail.