feat: 初始代码

AM初始代码，迁移自gitlabwh

Log:
Task: https://pms.uniontech.com/task-view-108539.html
Influence:
Change-Id: I6096f97e5d68d13796ff5dc51d9858c0f40264a0

src/modules/util/semaphore.cpp

@@ -0,0 +1,73 @@
+/*
+ * Copyright (c) 2020-2021. Uniontech Software Ltd. All rights reserved.
+ *
+ * Author:     Iceyer <me@iceyer.net>
+ *
+ * Maintainer: Iceyer <me@iceyer.net>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#include "semaphore.h"
+
+#include <sys/sem.h>
+
+#include "logger.h"
+
+namespace linglong {
+
+union semun {
+    int val;
+    struct semid_ds *buf;
+    ushort *array;
+};
+
+struct Semaphore::SemaphorePrivate {
+    explicit SemaphorePrivate(Semaphore *parent = nullptr)
+        : q_ptr(parent)
+    {
+        (void)q_ptr;
+    }
+
+    struct sembuf sem_lock = {0, -1, SEM_UNDO};
+
+    struct sembuf sem_unlock = {0, 1, SEM_UNDO};
+
+    int sem_id = -1;
+
+    Semaphore *q_ptr;
+};
+
+Semaphore::Semaphore(int key)
+    : dd_ptr(new SemaphorePrivate(this))
+{
+    dd_ptr->sem_id = semget(key, 1, IPC_CREAT | 0666);
+    if (dd_ptr->sem_id < 0) {
+        logErr() << "semget failed" << util::RetErrString(dd_ptr->sem_id);
+    }
+}
+
+Semaphore::~Semaphore() = default;
+
+int Semaphore::init()
+{
+    union semun sem_union = {0};
+    sem_union.val = 0;
+    logDbg() << "semctl " << dd_ptr->sem_id;
+    if (semctl(dd_ptr->sem_id, 0, SETVAL, sem_union) == -1) {
+        logErr() << "semctl failed" << util::RetErrString(-1);
+    }
+    return 0;
+}
+
+int Semaphore::passeren()
+{
+    return semop(dd_ptr->sem_id, &dd_ptr->sem_lock, 1);
+}
+
+int Semaphore::vrijgeven()
+{
+    return semop(dd_ptr->sem_id, &dd_ptr->sem_unlock, 1);
+}
+
+} // namespace linglong