Don't re-generate man-db after sudo apt update in the workflows.

PiperOrigin-RevId: 802542098

Author: gonnet

.github/workflows/build.yml

@@ -25,7 +25,10 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Update apt
-        run: sudo apt update
+        run: |
+          echo 'set man-db/auto-update false' | sudo debconf-communicate >/dev/null
+          sudo dpkg-reconfigure man-db
+          sudo apt update
       - name: Install ninja
         run: sudo apt install ninja-build
       - name: Setup ccache
@@ -53,7 +56,10 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Update apt
-        run: sudo apt update
+        run: |
+          echo 'set man-db/auto-update false' | sudo debconf-communicate >/dev/null
+          sudo dpkg-reconfigure man-db
+          sudo apt update
       - name: Install ninja
         run: sudo apt install ninja-build
       - name: Setup ccache
@@ -199,8 +205,10 @@ jobs:
     timeout-minutes: 60
     steps:
       - uses: actions/checkout@v4
-      - name: Update apt
-        run: sudo apt update
+        run: |
+          echo 'set man-db/auto-update false' | sudo debconf-communicate >/dev/null
+          sudo dpkg-reconfigure man-db
+          sudo apt update
       - name: Install ninja
         run: sudo apt install ninja-build
       - name: Setup Android NDK
@@ -280,7 +288,10 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Update apt
-        run: sudo apt update
+        run: |
+          echo 'set man-db/auto-update false' | sudo debconf-communicate >/dev/null
+          sudo dpkg-reconfigure man-db
+          sudo apt update
       - name: Install clang-18
         working-directory: ${{ github.workspace }}
         run: |
@@ -320,7 +331,10 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Update apt
-        run: sudo apt update
+        run: |
+          echo 'set man-db/auto-update false' | sudo debconf-communicate >/dev/null
+          sudo dpkg-reconfigure man-db
+          sudo apt update
       - name: Install clang-18
         working-directory: ${{ github.workspace }}
         run: |
@@ -363,7 +377,10 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Update apt
-        run: sudo apt update
+        run: |
+          echo 'set man-db/auto-update false' | sudo debconf-communicate >/dev/null
+          sudo dpkg-reconfigure man-db
+          sudo apt update
       - name: Install gcc-9
         working-directory: ${{ github.workspace }}
         run: |

src/pthreads.c

@@ -96,8 +96,12 @@ static int futex_wait(pthreadpool_atomic_uint32_t* address, uint32_t value) {
                  NULL);
 }
 
+static int futex_wake_n(pthreadpool_atomic_uint32_t* address, uint32_t n) {
+  return syscall(SYS_futex, address, FUTEX_WAKE | FUTEX_PRIVATE_FLAG, n);
+}
+
 static int futex_wake_all(pthreadpool_atomic_uint32_t* address) {
-  return syscall(SYS_futex, address, FUTEX_WAKE | FUTEX_PRIVATE_FLAG, INT_MAX);
+  return futex_wake_n(address, /*n=*/INT_MAX);
 }
 #elif defined(__EMSCRIPTEN__)
 static int futex_wait(pthreadpool_atomic_uint32_t* address, uint32_t value) {
@@ -280,10 +284,11 @@ static void signal_num_recruited_threads(pthreadpool_t threadpool) {
 static void signal_num_active_threads(pthreadpool_t threadpool,
                                       uint32_t max_num_waiting) {
 #if PTHREADPOOL_USE_FUTEX
-  if (pthreadpool_load_consume_uint32_t(&threadpool->num_waiting_threads) >
-      max_num_waiting) {
-    futex_wake_all(
-        (pthreadpool_atomic_uint32_t*)&threadpool->num_active_threads);
+  const uint32_t num_waiting_threads =
+      pthreadpool_load_consume_uint32_t(&threadpool->num_waiting_threads);
+  if (num_waiting_threads > max_num_waiting) {
+    futex_wake_n((pthreadpool_atomic_uint32_t*)&threadpool->num_active_threads,
+                 num_waiting_threads - max_num_waiting);
   }
 #else
   pthread_mutex_lock(&threadpool->num_active_threads_mutex);