Mercurial > projects > ldc
view tango/lib/compiler/llvmdc/critical.c @ 305:2b72433d5c8c trunk
[svn r326] Fixed a bunch of issues with printf's that MinGW32 did not support.
Fixed problems with label collisions when using labels inside inline asm. LabelStatement is now easily reached given its
Identifier, which should be useful elsewhere too.
Enabled inline asm for building the lib/compiler/llvmdc runtime code, fixing branches out of asm makes this possible.
author | lindquist |
---|---|
date | Fri, 27 Jun 2008 22:04:35 +0200 |
parents | 44a95ac7368a |
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 #include <stdio.h> #include <stdlib.h> #include <pthread.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; 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