From 0d65b692e1ff592b6848cfd73ca3c4f2f0a09814 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Steven=20Dee=20=28J=C5=8Dshin=29?= <mrdomino@stairwell.com>
Date: Sun, 1 Dec 2024 22:33:11 -0500
Subject: [PATCH] cross-process mutexes

---
 tool/net/redbean.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/tool/net/redbean.c b/tool/net/redbean.c
index a2f815e55..19ea17d1b 100644
--- a/tool/net/redbean.c
+++ b/tool/net/redbean.c
@@ -7376,6 +7376,14 @@ void RedBean(int argc, char *argv[]) {
            (shared = mmap(NULL, ROUNDUP(sizeof(struct Shared), getgransize()),
                           PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS,
                           -1, 0)));
+  pthread_mutexattr_t attr;
+  unassert(pthread_mutexattr_init(&attr));
+  unassert(pthread_mutexattr_setpshared(&attr, PTHREAD_PROCESS_SHARED));
+  unassert(pthread_mutex_init(&shared->datetime_mu, &attr));
+  unassert(pthread_mutex_init(&shared->server_mu, &attr));
+  unassert(pthread_mutex_init(&shared->children_mu, &attr));
+  unassert(pthread_mutex_init(&shared->lastmeltdown_mu, &attr));
+  unassert(pthread_mutexattr_destroy(&attr));
   if (daemonize) {
     for (int i = 0; i < 256; ++i) {
       close(i);