diff options
Diffstat (limited to 'mysys')
| -rw-r--r-- | mysys/CMakeLists.txt | 2 | ||||
| -rw-r--r-- | mysys/Makefile.am | 4 | ||||
| -rw-r--r-- | mysys/array.c | 4 | ||||
| -rw-r--r-- | mysys/mf_iocache2.c | 17 | ||||
| -rw-r--r-- | mysys/mf_tempdir.c | 15 | ||||
| -rw-r--r-- | mysys/mf_tempfile.c | 132 | ||||
| -rw-r--r-- | mysys/my_open.c | 7 | ||||
| -rw-r--r-- | mysys/my_semaphore.c | 103 | ||||
| -rw-r--r-- | mysys/my_static.c | 5 | ||||
| -rw-r--r-- | mysys/my_static.h | 4 | ||||
| -rw-r--r-- | mysys/my_winsem.c | 406 |
11 files changed, 82 insertions, 617 deletions
diff --git a/mysys/CMakeLists.txt b/mysys/CMakeLists.txt index c4d67f1e552..1ae625c4c03 100644 --- a/mysys/CMakeLists.txt +++ b/mysys/CMakeLists.txt @@ -39,6 +39,6 @@ ADD_LIBRARY(mysys array.c charset-def.c charset.c checksum.c default.c default_m my_mkdir.c my_mmap.c my_net.c my_once.c my_open.c my_pread.c my_pthread.c my_quick.c my_read.c my_realloc.c my_redel.c my_rename.c my_seek.c my_sleep.c my_static.c my_symlink.c my_symlink2.c my_sync.c my_thr_init.c my_wincond.c - my_windac.c my_winsem.c my_winthread.c my_write.c ptr_cmp.c queues.c + my_windac.c my_winthread.c my_write.c ptr_cmp.c queues.c rijndael.c safemalloc.c sha1.c string.c thr_alarm.c thr_lock.c thr_mutex.c thr_rwlock.c tree.c typelib.c my_vle.c base64.c my_memmem.c my_getpagesize.c) diff --git a/mysys/Makefile.am b/mysys/Makefile.am index fd6a0f76332..fca13ab52b8 100644 --- a/mysys/Makefile.am +++ b/mysys/Makefile.am @@ -47,7 +47,7 @@ libmysys_a_SOURCES = my_init.c my_getwd.c mf_getdate.c my_mmap.c \ my_sync.c my_getopt.c my_mkdir.c \ default_modify.c default.c \ my_compress.c checksum.c \ - my_net.c my_semaphore.c my_port.c my_sleep.c \ + my_net.c my_port.c my_sleep.c \ charset.c charset-def.c my_bitmap.c my_bit.c md5.c \ my_gethostbyname.c rijndael.c my_aes.c sha1.c \ my_handler.c my_netware.c my_largepage.c \ @@ -56,7 +56,7 @@ libmysys_a_SOURCES = my_init.c my_getwd.c mf_getdate.c my_mmap.c \ EXTRA_DIST = thr_alarm.c thr_lock.c my_pthread.c my_thr_init.c \ thr_mutex.c thr_rwlock.c \ CMakeLists.txt mf_soundex.c \ - my_conio.c my_wincond.c my_winsem.c my_winthread.c + my_conio.c my_wincond.c my_winthread.c libmysys_a_LIBADD = @THREAD_LOBJECTS@ # test_dir_DEPENDENCIES= $(LIBRARIES) # testhash_DEPENDENCIES= $(LIBRARIES) diff --git a/mysys/array.c b/mysys/array.c index 8f4a6087c00..60f5b255e18 100644 --- a/mysys/array.c +++ b/mysys/array.c @@ -15,10 +15,6 @@ /* Handling of arrays that can grow dynamicly. */ -#if defined(WIN32) || defined(__WIN__) -#undef SAFEMALLOC /* Problems with threads */ -#endif - #include "mysys_priv.h" #include "m_string.h" diff --git a/mysys/mf_iocache2.c b/mysys/mf_iocache2.c index b3ae18e9932..bdb5d057a16 100644 --- a/mysys/mf_iocache2.c +++ b/mysys/mf_iocache2.c @@ -50,7 +50,6 @@ int my_b_copy_to_file(IO_CACHE *cache, FILE *file) { - byte buf[IO_SIZE]; uint bytes_in_cache; DBUG_ENTER("my_b_copy_to_file"); @@ -58,19 +57,17 @@ my_b_copy_to_file(IO_CACHE *cache, FILE *file) if (reinit_io_cache(cache, READ_CACHE, 0L, FALSE, FALSE)) DBUG_RETURN(1); bytes_in_cache= my_b_bytes_in_cache(cache); - while (bytes_in_cache > 0) { - uint const read_bytes= min(bytes_in_cache, sizeof(buf)); - DBUG_PRINT("debug", ("Remaining %u bytes - Reading %u bytes", - bytes_in_cache, read_bytes)); - if (my_b_read(cache, buf, read_bytes)) - DBUG_RETURN(1); - if (my_fwrite(file, buf, read_bytes, MYF(MY_WME | MY_NABP)) == (uint) -1) + do + { + if (my_fwrite(file, cache->read_pos, bytes_in_cache, + MYF(MY_WME | MY_NABP)) == (uint) -1) DBUG_RETURN(1); - bytes_in_cache -= read_bytes; - } + cache->read_pos= cache->read_end; + } while ((bytes_in_cache= my_b_fill(cache))); DBUG_RETURN(0); } + my_off_t my_b_append_tell(IO_CACHE* info) { /* diff --git a/mysys/mf_tempdir.c b/mysys/mf_tempdir.c index 8d3fc40e96d..36eecbeac09 100644 --- a/mysys/mf_tempdir.c +++ b/mysys/mf_tempdir.c @@ -26,12 +26,11 @@ my_bool init_tmpdir(MY_TMPDIR *tmpdir, const char *pathlist) { char *end, *copy; char buff[FN_REFLEN]; - DYNAMIC_ARRAY t_arr; DBUG_ENTER("init_tmpdir"); DBUG_PRINT("enter", ("pathlist: %s", pathlist ? pathlist : "NULL")); pthread_mutex_init(&tmpdir->mutex, MY_MUTEX_INIT_FAST); - if (my_init_dynamic_array(&t_arr, sizeof(char*), 1, 5)) + if (my_init_dynamic_array(&tmpdir->full_list, sizeof(char*), 1, 5)) goto err; if (!pathlist || !pathlist[0]) { @@ -53,19 +52,19 @@ my_bool init_tmpdir(MY_TMPDIR *tmpdir, const char *pathlist) strmake(buff, pathlist, (uint) (end-pathlist)); length= cleanup_dirname(buff, buff); if (!(copy= my_strndup(buff, length, MYF(MY_WME))) || - insert_dynamic(&t_arr, (gptr) ©)) + insert_dynamic(&tmpdir->full_list, (gptr) ©)) DBUG_RETURN(TRUE); pathlist=end+1; } while (*end); - freeze_size(&t_arr); - tmpdir->list=(char **)t_arr.buffer; - tmpdir->max=t_arr.elements-1; + freeze_size(&tmpdir->full_list); + tmpdir->list=(char **)tmpdir->full_list.buffer; + tmpdir->max=tmpdir->full_list.elements-1; tmpdir->cur=0; DBUG_RETURN(FALSE); err: - delete_dynamic(&t_arr); /* Safe to free */ + delete_dynamic(&tmpdir->full_list); /* Safe to free */ pthread_mutex_destroy(&tmpdir->mutex); DBUG_RETURN(TRUE); } @@ -88,7 +87,7 @@ void free_tmpdir(MY_TMPDIR *tmpdir) uint i; for (i=0; i<=tmpdir->max; i++) my_free(tmpdir->list[i], MYF(0)); - my_free((gptr)tmpdir->list, MYF(0)); + delete_dynamic(&tmpdir->full_list); pthread_mutex_destroy(&tmpdir->mutex); } diff --git a/mysys/mf_tempfile.c b/mysys/mf_tempfile.c index 6c412157937..c1108f85054 100644 --- a/mysys/mf_tempfile.c +++ b/mysys/mf_tempfile.c @@ -22,15 +22,36 @@ #include <paths.h> #endif -#ifdef HAVE_TEMPNAM -#if !defined(__NETWARE__) -extern char **environ; -#endif -#endif + /* - Create a temporary file in a given directory - This function should be used instead of my_tempnam() ! + @brief + Create a temporary file with unique name in a given directory + + @details + create_temp_file + to pointer to buffer where temporary filename will be stored + dir directory where to create the file + prefix prefix the filename with this + mode Flags to use for my_create/my_open + MyFlags Magic flags + + @return + File descriptor of opened file if success + -1 and sets errno if fails. + + @note + The behaviour of this function differs a lot between + implementation, it's main use is to generate a file with + a name that does not already exist. + + When passing O_TEMPORARY flag in "mode" the file should + be automatically deleted + + The implementation using mkstemp should be considered the + reference implementation when adding a new or modifying an + existing one + */ File create_temp_file(char *to, const char *dir, const char *prefix, @@ -38,41 +59,33 @@ File create_temp_file(char *to, const char *dir, const char *prefix, myf MyFlags __attribute__((unused))) { File file= -1; + DBUG_ENTER("create_temp_file"); -#if defined(_MSC_VER) + DBUG_PRINT("enter", ("dir: %s, prefix: %s", dir, prefix)); +#if defined (__WIN__) + + /* + Use GetTempFileName to generate a unique filename, create + the file and release it's handle + - uses up to the first three letters from prefix + */ + if (GetTempFileName(dir, prefix, 0, to) == 0) + DBUG_RETURN(-1); + + DBUG_PRINT("info", ("name: %s", to)); + + /* + Open the file without the "open only if file doesn't already exist" + since the file has already been created by GetTempFileName + */ + if ((file= my_open(to, (mode & ~O_EXCL), MyFlags)) < 0) { - char temp[FN_REFLEN],*end,*res,**old_env,*temp_env[1]; - old_env=environ; - if (dir) - { - end=strend(dir)-1; - if (!dir[0]) - { /* Change empty string to current dir */ - to[0]= FN_CURLIB; - to[1]= 0; - dir=to; - } - else if (*end == FN_DEVCHAR) - { /* Get current dir for drive */ - _fullpath(temp,dir,FN_REFLEN); - dir=to; - } - else if (*end == FN_LIBCHAR && dir < end && end[-1] != FN_DEVCHAR) - { - strmake(to,dir,(uint) (end-dir)); /* Copy and remove last '\' */ - dir=to; - } - environ=temp_env; /* Force use of dir (dir not checked) */ - temp_env[0]=0; - } - if ((res=tempnam((char*) dir,(char *) prefix))) - { - strmake(to,res,FN_REFLEN-1); - (*free)(res); - file=my_create(to,0, mode | O_EXCL | O_NOFOLLOW, MyFlags); - } - environ=old_env; + /* Open failed, remove the file created by GetTempFileName */ + int tmp= my_errno; + (void) my_delete(to, MYF(0)); + my_errno= tmp; } + #elif defined(_ZTC__) if (!dir) dir=getenv("TMPDIR"); @@ -101,6 +114,8 @@ File create_temp_file(char *to, const char *dir, const char *prefix, } strmov(convert_dirname(to,dir,NullS),prefix_buff); org_file=mkstemp(to); + if (mode & O_TEMPORARY) + (void) my_delete(to, MYF(MY_WME | ME_NOINPUT)); file=my_register_filename(org_file, to, FILE_BY_MKSTEMP, EE_CANTCREATEFILE, MyFlags); /* If we didn't manage to register the name, remove the temp file */ @@ -113,6 +128,10 @@ File create_temp_file(char *to, const char *dir, const char *prefix, } #elif defined(HAVE_TEMPNAM) { +#if !defined(__NETWARE__) + extern char **environ; +#endif + char *res,**old_env,*temp_env[1]; if (dir && !dir[0]) { /* Change empty string to current dir */ @@ -147,40 +166,7 @@ File create_temp_file(char *to, const char *dir, const char *prefix, #endif } #else - { - register long uniq; - register int length; - my_string pos,end_pos; - /* Make an unique number */ - pthread_mutex_lock(&THR_LOCK_open); - uniq= ((long) getpid() << 20) + (long) _my_tempnam_used++ ; - pthread_mutex_unlock(&THR_LOCK_open); - if (!dir && !(dir=getenv("TMPDIR"))) /* Use this if possibly */ - dir=P_tmpdir; /* Use system default */ - length=strlen(dir)+strlen(pfx)+1; - - DBUG_PRINT("test",("mallocing %d byte",length+8+sizeof(TMP_EXT)+1)); - if (length+8+sizeof(TMP_EXT)+1 > FN_REFLENGTH) - errno=my_errno= ENAMETOOLONG; - else - { - end_pos=strmov(to,dir); - if (end_pos != to && end_pos[-1] != FN_LIBCHAR) - *end_pos++=FN_LIBCHAR; - end_pos=strmov(end_pos,pfx); - - for (length=0 ; length < 8 && uniq ; length++) - { - *end_pos++= _dig_vec_upper[(int) (uniq & 31)]; - uniq >>= 5; - } - (void) strmov(end_pos,TMP_EXT); - file=my_create(to,0, - (int) (O_RDWR | O_BINARY | O_TRUNC | O_EXCL | O_NOFOLLOW | - O_TEMPORARY | O_SHORT_LIVED), - MYF(MY_WME)); - } - } +#error No implementation found for create_temp_file #endif if (file >= 0) thread_safe_increment(my_tmp_file_created,&THR_LOCK_open); diff --git a/mysys/my_open.c b/mysys/my_open.c index 21bdedddc48..71e243c0173 100644 --- a/mysys/my_open.c +++ b/mysys/my_open.c @@ -352,7 +352,12 @@ File my_sopen(const char *path, int oflag, int shflag, int pmode) return -1; /* return error to caller */ } - fh= _open_osfhandle((intptr_t)osfh, oflag & (_O_APPEND | _O_RDONLY | _O_TEXT)); + if ((fh= _open_osfhandle((intptr_t)osfh, + oflag & (_O_APPEND | _O_RDONLY | _O_TEXT))) == -1) + { + _dosmaperr(GetLastError()); /* map error */ + CloseHandle(osfh); + } return fh; /* return handle */ } diff --git a/mysys/my_semaphore.c b/mysys/my_semaphore.c deleted file mode 100644 index efabd4b42d9..00000000000 --- a/mysys/my_semaphore.c +++ /dev/null @@ -1,103 +0,0 @@ -/* Copyright (C) 2002-2003 MySQL AB - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; version 2 of the License. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ - -/* - Simple implementation of semaphores, needed to compile MySQL on systems - that doesn't support semaphores. -*/ - -#include <my_global.h> -#include <my_semaphore.h> -#include <errno.h> - -#if !defined(__WIN__) && !defined(HAVE_SEMAPHORE_H) && defined(THREAD) - -int sem_init(sem_t * sem, int pshared, uint value) -{ - sem->count=value; - pthread_cond_init(&sem->cond, 0); - pthread_mutex_init(&sem->mutex, 0); - return 0; -} - -int sem_destroy(sem_t * sem) -{ - int err1,err2; - err1=pthread_cond_destroy(&sem->cond); - err2=pthread_mutex_destroy(&sem->mutex); - if (err1 || err2) - { - errno=err1 ? err1 : err2; - return -1; - } - return 0; -} - -int sem_wait(sem_t * sem) -{ - if ((errno=pthread_mutex_lock(&sem->mutex))) - return -1; - while (!sem->count) - pthread_cond_wait(&sem->cond, &sem->mutex); - if (errno) - return -1; - sem->count--; /* mutex is locked here */ - pthread_mutex_unlock(&sem->mutex); - return 0; -} - -int sem_trywait(sem_t * sem) -{ - if ((errno=pthread_mutex_lock(&sem->mutex))) - return -1; - if (sem->count) - sem->count--; - else - errno=EAGAIN; - pthread_mutex_unlock(&sem->mutex); - return errno ? -1 : 0; -} - - -int sem_post(sem_t * sem) -{ - if ((errno=pthread_mutex_lock(&sem->mutex))) - return -1; - sem->count++; - pthread_mutex_unlock(&sem->mutex); /* does it really matter what to do */ - pthread_cond_signal(&sem->cond); /* first: x_unlock or x_signal ? */ - return 0; -} - -int sem_post_multiple(sem_t * sem, uint count) -{ - if ((errno=pthread_mutex_lock(&sem->mutex))) - return -1; - sem->count+=count; - pthread_mutex_unlock(&sem->mutex); /* does it really matter what to do */ - pthread_cond_broadcast(&sem->cond); /* first: x_unlock or x_broadcast ? */ - return 0; -} - -int sem_getvalue(sem_t * sem, uint *sval) -{ - if ((errno=pthread_mutex_lock(&sem->mutex))) - return -1; - *sval=sem->count; - pthread_mutex_unlock(&sem->mutex); - return 0; -} - -#endif /* !defined(__WIN__) && !defined(HAVE_SEMAPHORE_H) && defined(THREAD) */ diff --git a/mysys/my_static.c b/mysys/my_static.c index 95521c49ab7..42dd9d71490 100644 --- a/mysys/my_static.c +++ b/mysys/my_static.c @@ -69,11 +69,6 @@ my_bool my_use_large_pages= 0; uint my_large_page_size= 0; #endif - /* from my_tempnam */ -#if !defined(HAVE_TEMPNAM) || defined(HPUX11) -int _my_tempnam_used=0; -#endif - /* from safe_malloc */ uint sf_malloc_prehunc=0, /* If you have problem with core- */ sf_malloc_endhunc=0, /* dump when malloc-message.... */ diff --git a/mysys/my_static.h b/mysys/my_static.h index cbd293a0431..b438c936225 100644 --- a/mysys/my_static.h +++ b/mysys/my_static.h @@ -60,10 +60,6 @@ extern const char *soundex_map; extern USED_MEM* my_once_root_block; extern uint my_once_extra; -#if !defined(HAVE_TEMPNAM) || defined(HPUX11) -extern int _my_tempnam_used; -#endif - extern byte *sf_min_adress,*sf_max_adress; extern uint sf_malloc_count; extern struct st_irem *sf_malloc_root; diff --git a/mysys/my_winsem.c b/mysys/my_winsem.c deleted file mode 100644 index e2713d189b2..00000000000 --- a/mysys/my_winsem.c +++ /dev/null @@ -1,406 +0,0 @@ -/* - * ------------------------------------------------------------- - * - * Module: my_semaphore.c (Original: semaphore.c from pthreads library) - * - * Purpose: - * Semaphores aren't actually part of the PThreads standard. - * They are defined by the POSIX Standard: - * - * POSIX 1003.1b-1993 (POSIX.1b) - * - * ------------------------------------------------------------- - * - * Pthreads-win32 - POSIX Threads Library for Win32 - * Copyright (C) 1998 - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public - * License along with this library; if not, write to the Free - * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, - * MA 02111-1307, USA - */ - -/* - NEED_SEM is not used in MySQL and should only be needed under - Windows CE. - - The big changes compared to the original version was to not allocate - any additional memory in sem_init() but to instead store everthing - we need in sem_t. - - TODO: - To get HAVE_CREATESEMAPHORE we have to define the struct - in my_semaphore.h -*/ - -#include "mysys_priv.h" -#ifdef __WIN__ -#include "my_semaphore.h" -#include <errno.h> - -/* - DOCPUBLIC - This function initializes an unnamed semaphore. the - initial value of the semaphore is 'value' - - PARAMETERS - sem Pointer to an instance of sem_t - - pshared If zero, this semaphore may only be shared between - threads in the same process. - If nonzero, the semaphore can be shared between - processes - - value Initial value of the semaphore counter - - RESULTS - 0 Successfully created semaphore, - -1 Failed, error in errno - - ERRNO - EINVAL 'sem' is not a valid semaphore, - ENOSPC A required resource has been exhausted, - ENOSYS Semaphores are not supported, - EPERM The process lacks appropriate privilege - -*/ - -int -sem_init (sem_t *sem, int pshared, unsigned int value) -{ - int result = 0; - - if (pshared != 0) - { - /* - We don't support creating a semaphore that can be shared between - processes - */ - result = EPERM; - } - else - { -#ifndef HAVE_CREATESEMAPHORE - sem->value = value; - sem->event = CreateEvent(NULL, - FALSE, /* manual reset */ - FALSE, /* initial state */ - NULL); - if (!sem->event) - result = ENOSPC; - else - { - if (value) - SetEvent(sem->event); - InitializeCriticalSection(&sem->sem_lock_cs); - } -#else /* HAVE_CREATESEMAPHORE */ - *sem = CreateSemaphore (NULL, /* Always NULL */ - value, /* Initial value */ - 0x7FFFFFFFL, /* Maximum value */ - NULL); /* Name */ - if (!*sem) - result = ENOSPC; -#endif /* HAVE_CREATESEMAPHORE */ - } - if (result != 0) - { - errno = result; - return -1; - } - return 0; -} /* sem_init */ - - -/* - DOCPUBLIC - This function destroys an unnamed semaphore. - - PARAMETERS - sem Pointer to an instance of sem_t - - RESULTS - 0 Successfully destroyed semaphore, - -1 Failed, error in errno - ERRNO - EINVAL 'sem' is not a valid semaphore, - ENOSYS Semaphores are not supported, - EBUSY Threads (or processes) are currently blocked on 'sem' -*/ - -int -sem_destroy (sem_t * sem) -{ - int result = 0; - -#ifdef EXTRA_DEBUG - if (sem == NULL || *sem == NULL) - { - errno=EINVAL; - return; - } -#endif /* EXTRA_DEBUG */ - -#ifndef HAVE_CREATESEMAPHORE - if (! CloseHandle(sem->event)) - result = EINVAL; - else - DeleteCriticalSection(&sem->sem_lock_cs); -#else /* HAVE_CREATESEMAPHORE */ - if (!CloseHandle(*sem)) - result = EINVAL; -#endif /* HAVE_CREATESEMAPHORE */ - if (result) - { - errno = result; - return -1; - } - *sem=0; /* Safety */ - return 0; -} /* sem_destroy */ - - -/* - DOCPUBLIC - This function tries to wait on a semaphore. If the - semaphore value is greater than zero, it decreases - its value by one. If the semaphore value is zero, then - this function returns immediately with the error EAGAIN - - PARAMETERS - sem Pointer to an instance of sem_t - - RESULTS - 0 Successfully decreased semaphore, - -1 Failed, error in errno - - ERRNO - EAGAIN The semaphore was already locked, - EINVAL 'sem' is not a valid semaphore, - ENOSYS Semaphores are not supported, - EINTR The function was interrupted by a signal, - EDEADLK A deadlock condition was detected. -*/ - -int -sem_trywait(sem_t * sem) -{ -#ifndef HAVE_CREATESEMAPHORE - /* not yet implemented! */ - int errno = EINVAL; - return -1; -#else /* HAVE_CREATESEMAPHORE */ -#ifdef EXTRA_DEBUG - if (sem == NULL || *sem == NULL) - { - errno=EINVAL; - return -1; - } -#endif /* EXTRA_DEBUG */ - if (WaitForSingleObject (*sem, 0) == WAIT_TIMEOUT) - { - errno= EAGAIN; - return -1; - } - return 0; -#endif /* HAVE_CREATESEMAPHORE */ - -} /* sem_trywait */ - - -#ifndef HAVE_CREATESEMAPHORE - -static void -ptw32_decrease_semaphore(sem_t * sem) -{ - EnterCriticalSection(&sem->sem_lock_cs); - DBUG_ASSERT(sem->value != 0); - sem->value--; - if (sem->value != 0) - SetEvent(sem->event); - LeaveCriticalSection(&sem->sem_lock_cs); -} - -static BOOL -ptw32_increase_semaphore(sem_t * sem, unsigned int n) -{ - BOOL result=FALSE; - - EnterCriticalSection(&sem->sem_lock_cs); - if (sem->value + n > sem->value) - { - sem->value += n; - SetEvent(sem->event); - result = TRUE; - } - LeaveCriticalSection(&sem->sem_lock_cs); - return result; -} - -#endif /* HAVE_CREATESEMAPHORE */ - - -/* - ------------------------------------------------------ - DOCPUBLIC - This function waits on a semaphore. If the - semaphore value is greater than zero, it decreases - its value by one. If the semaphore value is zero, then - the calling thread (or process) is blocked until it can - successfully decrease the value or until interrupted by - a signal. - - PARAMETERS - sem Pointer to an instance of sem_t - - RESULTS - 0 Successfully decreased semaphore, - -1 Failed, error in errno - - ERRNO - EINVAL 'Sem' is not a valid semaphore, - ENOSYS Semaphores are not supported, - EINTR The function was interrupted by a signal, - EDEADLK A deadlock condition was detected. -*/ - -int -sem_wait(sem_t *sem) -{ - int result; - -#ifdef EXTRA_DEBUG - if (sem == NULL || *sem == NULL) - { - errno=EINVAL; - return -1; - } -#endif /* EXTRA_DEBUG */ - -#ifndef HAVE_CREATESEMAPHORE - result=WaitForSingleObject(sem->event, INFINITE); -#else - result=WaitForSingleObject(*sem, INFINITE); -#endif - if (result == WAIT_FAILED || result == WAIT_ABANDONED_0) - result = EINVAL; - else if (result == WAIT_TIMEOUT) - result = ETIMEDOUT; - else - result=0; - if (result) - { - errno = result; - return -1; - } -#ifndef HAVE_CREATESEMAPHORE - ptw32_decrease_semaphore(sem); -#endif /* HAVE_CREATESEMAPHORE */ - return 0; -} - - -/* - ------------------------------------------------------ - DOCPUBLIC - This function posts a wakeup to a semaphore. If there - are waiting threads (or processes), one is awakened; - otherwise, the semaphore value is incremented by one. - - PARAMETERS - sem Pointer to an instance of sem_t - - RESULTS - 0 Successfully posted semaphore, - -1 Failed, error in errno - - ERRNO - EINVAL 'sem' is not a valid semaphore, - ENOSYS Semaphores are not supported, - -*/ - -int -sem_post (sem_t * sem) -{ -#ifdef EXTRA_DEBUG - if (sem == NULL || *sem == NULL) - { - errno=EINVAL; - return -1; - } -#endif /* EXTRA_DEBUG */ - -#ifndef HAVE_CREATESEMAPHORE - if (! ptw32_increase_semaphore(sem, 1)) -#else /* HAVE_CREATESEMAPHORE */ - if (! ReleaseSemaphore(*sem, 1, 0)) -#endif /* HAVE_CREATESEMAPHORE */ - { - errno=EINVAL; - return -1; - } - return 0; -} - - -/* - ------------------------------------------------------ - DOCPUBLIC - This function posts multiple wakeups to a semaphore. If there - are waiting threads (or processes), n <= count are awakened; - the semaphore value is incremented by count - n. - - PARAMETERS - sem Pointer to an instance of sem_t - count Counter, must be greater than zero. - - RESULTS - 0 Successfully posted semaphore, - -1 Failed, error in errno - - ERRNO - EINVAL 'sem' is not a valid semaphore or count is less - than or equal to zero. -*/ - -int -sem_post_multiple (sem_t * sem, unsigned int count) -{ -#ifdef EXTRA_DEBUG - if (sem == NULL || *sem == NULL || count <= 0) - { - errno=EINVAL; - return -1; - } -#endif /* EXTRA_DEBUG */ -#ifndef HAVE_CREATESEMAPHORE - if (! ptw32_increase_semaphore (sem, count)) -#else /* HAVE_CREATESEMAPHORE */ - if (! ReleaseSemaphore(*sem, count, 0)) -#endif /* HAVE_CREATESEMAPHORE */ - { - errno = EINVAL; - return -1; - } - return 0; -} - -int -sem_getvalue (sem_t *sem, unsigned int *sval) -{ - errno = ENOSYS; - return -1; -} /* sem_getvalue */ - -#endif /* __WIN__ */ |