diff options
Diffstat (limited to 'libdash/source/portable')
| -rw-r--r-- | libdash/source/portable/MultiThreading.cpp | 112 | ||||
| -rw-r--r-- | libdash/source/portable/MultiThreading.h | 70 | ||||
| -rw-r--r-- | libdash/source/portable/Networking.h | 27 |
3 files changed, 209 insertions, 0 deletions
diff --git a/libdash/source/portable/MultiThreading.cpp b/libdash/source/portable/MultiThreading.cpp new file mode 100644 index 00000000..5d1fe9c0 --- /dev/null +++ b/libdash/source/portable/MultiThreading.cpp @@ -0,0 +1,112 @@ +#include "MultiThreading.h" + +THREAD_HANDLE CreateThreadPortable (void *(*start_routine) (void *), void *arg) +{ + #if defined _WIN32 || defined _WIN64 + return CreateThread (0, 0, (LPTHREAD_START_ROUTINE)start_routine, (LPVOID)arg, 0, 0); + #else + THREAD_HANDLE th = (THREAD_HANDLE)malloc(sizeof(pthread_t)); + + if (!th) + { + std::cerr << "Error allocating thread." << std::endl; + return NULL; + } + + pthread_attr_t attr; + pthread_attr_init(&attr); + pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED); + + if(int err = pthread_create(th, &attr, start_routine, arg)) + { + std::cerr << strerror(err) << std::endl; + return NULL; + } + return th; + #endif +} +void DestroyThreadPortable (THREAD_HANDLE th) +{ + #if !defined _WIN32 && !defined _WIN64 + if(th) + free(th); + #endif +} + +/**************************************************************************** +* Condition variables for Windows XP and older windows sytems +*****************************************************************************/ +#if defined WINXPOROLDER + void InitCondition (condition_variable_t *cv) + { + InitializeCriticalSection(&cv->waitersCountLock); + + cv->waitersCount = 0; + cv->waitGenerationCount = 0; + cv->releaseCount = 0; + + cv->waitingEvent = CreateEvent (NULL, // no security + TRUE, // manual-reset + FALSE, // non-signaled initially + NULL); // unnamed + } + void WaitCondition (condition_variable_t *cv, CRITICAL_SECTION *externalMutex) + { + EnterCriticalSection(&cv->waitersCountLock); + + cv->waitersCount++; + + int currentGenerationCount = cv->waitGenerationCount; + + LeaveCriticalSection(&cv->waitersCountLock); + LeaveCriticalSection(externalMutex); + + bool isWaitDone = false; + while(!isWaitDone) + { + WaitForSingleObject (cv->waitingEvent, INFINITE); + EnterCriticalSection (&cv->waitersCountLock); + + isWaitDone = (cv->releaseCount > 0 && cv->waitGenerationCount != currentGenerationCount); + LeaveCriticalSection (&cv->waitersCountLock); + } + + EnterCriticalSection(externalMutex); + EnterCriticalSection(&cv->waitersCountLock); + + cv->waitersCount--; + cv->releaseCount--; + bool isLastWaiter = (cv->releaseCount == 0); + + LeaveCriticalSection(&cv->waitersCountLock); + + if(isLastWaiter) + ResetEvent(cv->waitingEvent); + } + void SignalCondition (condition_variable_t *cv) + { + EnterCriticalSection(&cv->waitersCountLock); + + if(cv->waitersCount > cv->releaseCount) + { + SetEvent(cv->waitingEvent); + cv->releaseCount++; + cv->waitGenerationCount++; + } + + LeaveCriticalSection(&cv->waitersCountLock); + } + void BroadcastCondition (condition_variable_t *cv) + { + EnterCriticalSection(&cv->waitersCountLock); + + if(cv->waitersCount > 0) + { + SetEvent(cv->waitingEvent); + cv->releaseCount = cv->waitersCount; + cv->waitGenerationCount++; + } + + LeaveCriticalSection(&cv->waitersCountLock); +} +#endif diff --git a/libdash/source/portable/MultiThreading.h b/libdash/source/portable/MultiThreading.h new file mode 100644 index 00000000..c1b45f5c --- /dev/null +++ b/libdash/source/portable/MultiThreading.h @@ -0,0 +1,70 @@ +#ifndef PORTABLE_MULTITHREADING_H_ +#define PORTABLE_MULTITHREADING_H_ + +#if defined _WIN32 || defined _WIN64 + + #define _WINSOCKAPI_ + #include <Windows.h> + #define DeleteConditionVariable(cond_p) {} + + typedef HANDLE THREAD_HANDLE; + + #if defined WINXPOROLDER + /**************************************************************************** + * Variables + *****************************************************************************/ + struct condition_variable_t + { + int waitersCount; // Count of the number of waiters. + CRITICAL_SECTION waitersCountLock; // Serialize access to <waitersCount>. + int releaseCount; // Number of threads to release via a <BroadcastCondition> or a <SignalCondition>. + int waitGenerationCount; // Keeps track of the current "generation" so that we don't allow one thread to steal all the "releases" from the broadcast. + HANDLE waitingEvent; // A manual-reset event that's used to block and release waiting threads. + }; + /**************************************************************************** + * Prototypes + *****************************************************************************/ + void InitCondition (condition_variable_t *cv); + void WaitCondition (condition_variable_t *cv, CRITICAL_SECTION *externalMutex); + void SignalCondition (condition_variable_t *cv); + void BroadcastCondition (condition_variable_t *cv); + /**************************************************************************** + * Defines + *****************************************************************************/ + #define CONDITION_VARIABLE condition_variable_t + + #define InitializeConditionVariable(cond_p) InitCondition(cond_p) + #define SleepConditionVariableCS(cond_p, mutex_p, infinite) WaitCondition(cond_p, mutex_p) // INFINITE should be handled mor properly + #define WakeConditionVariable(cond_p) SignalCondition(cond_p) + #define WakeAllConditionVariable(cond_p) BroadcastCondition(cond_p) + #endif + +#else + + #include <string.h> + #include <pthread.h> + #include <errno.h> + #include <stdlib.h> + #include <iostream> + + #define CRITICAL_SECTION pthread_mutex_t + #define CONDITION_VARIABLE pthread_cond_t + + #define InitializeCriticalSection(mutex_p) pthread_mutex_init(mutex_p, NULL) + #define DeleteCriticalSection(mutex_p) pthread_mutex_destroy(mutex_p) + #define EnterCriticalSection(mutex_p) pthread_mutex_lock(mutex_p) + #define LeaveCriticalSection(mutex_p) pthread_mutex_unlock(mutex_p) + #define InitializeConditionVariable(cond_p) pthread_cond_init(cond_p, NULL) + #define DeleteConditionVariable(cond_p) pthread_cond_destroy(cond_p) + #define SleepConditionVariableCS(cond_p, mutex_p, infinite) pthread_cond_wait(cond_p, mutex_p) // INFINITE should be handled mor properly + #define WakeConditionVariable(cond_p) pthread_cond_signal(cond_p) + #define WakeAllConditionVariable(cond_p) pthread_cond_broadcast(cond_p) + + typedef pthread_t* THREAD_HANDLE; + +#endif + +THREAD_HANDLE CreateThreadPortable (void *(*start_routine) (void *), void *arg); +void DestroyThreadPortable (THREAD_HANDLE th); + +#endif // PORTABLE_MULTITHREADING_H_
\ No newline at end of file diff --git a/libdash/source/portable/Networking.h b/libdash/source/portable/Networking.h new file mode 100644 index 00000000..6239c3a3 --- /dev/null +++ b/libdash/source/portable/Networking.h @@ -0,0 +1,27 @@ +#ifndef PORTABLE_NETWORKING_H_ +#define PORTABLE_NETWORKING_H_ + +#if defined _WIN32 || defined _WIN64 + +#include <WinSock2.h> +#include <WS2tcpip.h> + +#else + +#include <sys/socket.h> +#include <netinet/in.h> +#include <netinet/ip.h> /* superset of previous */ +#include <netdb.h> +#include <string.h> +#include <stdlib.h> +#include <unistd.h> + +#define closesocket(socket) close(socket) +#define WSAStartup(wVersionRequested, lpWSAData) 0 +#define WSACleanup() {} + +typedef unsigned char WSADATA; + +#endif + +#endif // PORTABLE_NETWORKING_H_ |