Way to miss two files KLS - doh

common/ipc_mutex.cpp

@@ -0,0 +1,102 @@
+#include "ipc_mutex.h"
+#ifdef _WINDOWS
+#include <Windows.h>
+#else
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <semaphore.h>
+#include <unistd.h>
+#include <time.h>
+#endif
+#include "types.h"
+#include "eqemu_exception.h"
+
+
+namespace EQEmu {
+    struct IPCMutex::Implementation {
+#ifdef _WINDOWS
+        HANDLE mut_;
+#else
+        sem_t *sem_;
+#endif
+    };
+
+    IPCMutex::IPCMutex(std::string name) : locked_(false) {
+        imp_ = new Implementation;
+#ifdef _WINDOWS
+        std::string final_name = "EQEmuMutex_";
+        final_name += name;
+
+        imp_->mut_ = CreateMutex(NULL,
+            FALSE,
+            final_name.c_str());
+
+        if(!imp_->mut_) {
+            EQ_EXCEPT("IPC Mutex", "Could not create mutex.");
+        }
+#else
+        std::string final_name = "/EQEmuMutex_";
+        final_name += name;
+        
+        imp_->sem_ = sem_open(final_name.c_str(), O_CREAT, S_IRUSR | S_IWUSR, 1);
+        if(imp_->sem_ == SEM_FAILED) {
+                EQ_EXCEPT("IPC Mutex", "Could not create mutex.");
+        }
+#endif
+    }
+
+    IPCMutex::~IPCMutex() {
+#ifdef _WINDOWS
+        if(imp_->mut_) {
+            if(locked_) {
+                ReleaseMutex(imp_->mut_);
+            }
+            CloseHandle(imp_->mut_);
+        }
+#else
+        if(imp_->sem_) {
+            if(locked_) {
+                sem_post(imp_->sem_);
+            }
+            sem_close(imp_->sem_);
+        }
+#endif
+        delete imp_;
+    }
+
+    bool IPCMutex::Lock() {
+        if(locked_) {
+            return false;
+        }
+
+#ifdef _WINDOWS
+        DWORD wait_result = WaitForSingleObject(imp_->mut_, INFINITE);
+        if(wait_result != WAIT_OBJECT_0) {
+            return false;
+        }
+#else
+        if(sem_wait(imp_->sem_) == -1) {
+            return false;
+        }
+#endif
+        locked_ = true;
+        return true;
+    }
+
+    bool IPCMutex::Unlock() {
+        if(!locked_) {
+            return false;
+        }
+#ifdef _WINDOWS
+        if(!ReleaseMutex(imp_->mut_)) {
+            return false;
+        }
+#else
+        if(sem_post(imp_->sem_) == -1) {
+            return false;
+        }
+#endif
+        locked_ = false;
+        return true;
+    }
+}

common/ipc_mutex.h

@@ -0,0 +1,47 @@
+#ifndef _MUTEX_H_
+#define _MUTEX_H_
+
+#include <string>
+
+namespace EQEmu {
+    
+    //! Interprocess Named Binary Semaphore (Mutex)
+    /*!
+        Important to note: while this can be used to synchronize processes, it is not in itself re-entrant or thread-safe 
+        and thus should be used from one thread and non-recursively.  It was intended to be a simple synchronization method
+        for our MemoryMappedFile loading.
+    */
+    class IPCMutex {
+        struct Implementation;
+    public:
+        //! Constructor
+        /*!
+            Creates a named binary semaphore, basically a semaphore that is init S <- 1
+        \param name The name of this mutex.
+        */
+        IPCMutex(std::string name);
+        
+        //! Destructor
+        ~IPCMutex();
+        
+        //! Lock the mutex
+        /*!
+            Same basic function as P(): for(;;) { if(S > 0) { S -= 1; break; } }
+        */
+        bool Lock();
+        
+        //! Unlocks the mutex
+        /*!
+            Same basic function as V(): S += 1;
+        */
+        bool Unlock();
+    private:
+        IPCMutex(const IPCMutex&);
+        const IPCMutex& operator=(const IPCMutex&);
+        
+        bool locked_; //!< Whether this mutex is locked or not
+        Implementation *imp_;
+    };
+}
+
+#endif