Mercurial > projects > ldc
view runtime/internal/critical.c @ 1138:4c8bb03e4fbc
Update DtoConstFP() to be correct after LLVM r67562, which changed the way the
APFloat constructor expects its i80 APInts to be formatted. (They're now
actually consistent with the x87 format)
author | Frits van Bommel <fvbommel wxs.nl> |
---|---|
date | Tue, 24 Mar 2009 15:24:59 +0100 |
parents | aa953cc960b6 |
children |
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/* * Placed into the Public Domain * written by Walter Bright, Digital Mars * www.digitalmars.com */ /* ================================= Win32 ============================ */ #if _WIN32 #include <windows.h> /****************************************** * Enter/exit critical section. */ /* We don't initialize critical sections unless we actually need them. * So keep a linked list of the ones we do use, and in the static destructor * code, walk the list and release them. */ typedef struct D_CRITICAL_SECTION { struct D_CRITICAL_SECTION *next; CRITICAL_SECTION cs; } D_CRITICAL_SECTION; static D_CRITICAL_SECTION *dcs_list; static D_CRITICAL_SECTION critical_section; static volatile int inited; void _d_criticalenter(D_CRITICAL_SECTION *dcs) { if (!dcs->next) { EnterCriticalSection(&critical_section.cs); if (!dcs->next) // if, in the meantime, another thread didn't set it { dcs->next = dcs_list; dcs_list = dcs; InitializeCriticalSection(&dcs->cs); } LeaveCriticalSection(&critical_section.cs); } EnterCriticalSection(&dcs->cs); } void _d_criticalexit(D_CRITICAL_SECTION *dcs) { LeaveCriticalSection(&dcs->cs); } void _STI_critical_init() { if (!inited) { InitializeCriticalSection(&critical_section.cs); dcs_list = &critical_section; inited = 1; } } void _STD_critical_term() { if (inited) { inited = 0; while (dcs_list) { DeleteCriticalSection(&dcs_list->cs); dcs_list = dcs_list->next; } } } #endif /* ================================= linux ============================ */ #if linux || __APPLE__ || __FreeBSD__ || (defined(__SVR4) && defined (__sun)) #include <stdio.h> #include <stdlib.h> #include <pthread.h> #if !linux #define PTHREAD_MUTEX_RECURSIVE_NP PTHREAD_MUTEX_RECURSIVE #endif /****************************************** * Enter/exit critical section. */ /* We don't initialize critical sections unless we actually need them. * So keep a linked list of the ones we do use, and in the static destructor * code, walk the list and release them. */ typedef struct D_CRITICAL_SECTION { struct D_CRITICAL_SECTION *next; pthread_mutex_t cs; } D_CRITICAL_SECTION; static D_CRITICAL_SECTION *dcs_list; static D_CRITICAL_SECTION critical_section; static pthread_mutexattr_t _criticals_attr; void _STI_critical_init(void); void _STD_critical_term(void); void _d_criticalenter(D_CRITICAL_SECTION *dcs) { if (!dcs_list) { _STI_critical_init(); atexit(_STD_critical_term); } //printf("_d_criticalenter(dcs = x%x)\n", dcs); if (!dcs->next) { pthread_mutex_lock(&critical_section.cs); if (!dcs->next) // if, in the meantime, another thread didn't set it { dcs->next = dcs_list; dcs_list = dcs; pthread_mutex_init(&dcs->cs, &_criticals_attr); } pthread_mutex_unlock(&critical_section.cs); } pthread_mutex_lock(&dcs->cs); } void _d_criticalexit(D_CRITICAL_SECTION *dcs) { //printf("_d_criticalexit(dcs = x%x)\n", dcs); pthread_mutex_unlock(&dcs->cs); } void _STI_critical_init() { if (!dcs_list) { //printf("_STI_critical_init()\n"); pthread_mutexattr_init(&_criticals_attr); pthread_mutexattr_settype(&_criticals_attr, PTHREAD_MUTEX_RECURSIVE_NP); // The global critical section doesn't need to be recursive pthread_mutex_init(&critical_section.cs, 0); dcs_list = &critical_section; } } void _STD_critical_term() { if (dcs_list) { //printf("_STI_critical_term()\n"); while (dcs_list) { //printf("\tlooping... %x\n", dcs_list); pthread_mutex_destroy(&dcs_list->cs); dcs_list = dcs_list->next; } } } #endif