Mercurial > projects > ldc
view runtime/internal/critical.c @ 1064:f0b6549055ab
Make LDC work with LLVM trunk (s/LinkOnceLinkage/LinkOnceOdrLinkage/)
Also moved the #defines for linkage types into a separate header instead of
mars.h so we can #include revisions.h without having to rebuild the entire
frontend every time we update.
(I'm using revisions.h to get the LLVM revision for use in preprocessor
conditionals. It should work with LLVM release 2.5, old trunk and new trunk)
author | Frits van Bommel <fvbommel wxs.nl> |
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date | Sun, 08 Mar 2009 16:13:10 +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