1 /*
2 This file is part of UFFS, the Ultra-low-cost Flash File System.
3
4 Copyright (C) 2005-2009 Ricky Zheng <[email protected]>
5
6 UFFS is free software; you can redistribute it and/or modify it under
7 the GNU Library General Public License as published by the Free Software
8 Foundation; either version 2 of the License, or (at your option) any
9 later version.
10
11 UFFS is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 or GNU Library General Public License, as applicable, for more details.
15
16 You should have received a copy of the GNU General Public License
17 and GNU Library General Public License along with UFFS; if not, write
18 to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
19 Boston, MA 02110-1301, USA.
20
21 As a special exception, if other files instantiate templates or use
22 macros or inline functions from this file, or you compile this file
23 and link it with other works to produce a work based on this file,
24 this file does not by itself cause the resulting work to be covered
25 by the GNU General Public License. However the source code for this
26 file must still be made available in accordance with section (3) of
27 the GNU General Public License v2.
28
29 This exception does not invalidate any other reasons why a work based
30 on this file might be covered by the GNU General Public License.
31 */
32
33 /**
34 * \file uffs_os_posix.c
35 * \brief Emulation on POSIX host. This is just a dumb implementation, does not really create semaphores.
36 * \author Ricky Zheng
37 */
38
39 #include "uffs_config.h"
40 #include "uffs/uffs_os.h"
41 #include "uffs/uffs_public.h"
42 #include <memory.h>
43 #include <stdlib.h>
44 #include <time.h>
45 #include <stdio.h>
46 #include <pthread.h>
47
48 #define PFX "os : "
49
uffs_SemCreate(OSSEM * sem)50 int uffs_SemCreate(OSSEM *sem)
51 {
52 pthread_mutex_t *mutex = (pthread_mutex_t *) malloc(sizeof(pthread_mutex_t));
53 int ret = -1;
54
55 if (mutex) {
56 ret = pthread_mutex_init(mutex, NULL /* default attr */);
57 if (ret == 0) {
58 *sem = (OSSEM *)mutex;
59 }
60 else {
61 free(mutex);
62 }
63 }
64
65 return ret;
66 }
67
uffs_SemWait(OSSEM sem)68 int uffs_SemWait(OSSEM sem)
69 {
70 return pthread_mutex_lock((pthread_mutex_t *)sem);
71 }
72
uffs_SemSignal(OSSEM sem)73 int uffs_SemSignal(OSSEM sem)
74 {
75 return pthread_mutex_unlock((pthread_mutex_t *)sem);;
76 }
77
uffs_SemDelete(OSSEM * sem)78 int uffs_SemDelete(OSSEM *sem)
79 {
80 pthread_mutex_t *mutex = (pthread_mutex_t *) (*sem);
81 int ret = -1;
82
83 if (mutex) {
84 ret = pthread_mutex_destroy(mutex);
85 if (ret == 0) {
86 free(mutex);
87 *sem = 0;
88 }
89 }
90 return ret;
91 }
92
uffs_OSGetTaskId(void)93 int uffs_OSGetTaskId(void)
94 {
95 //TODO: ... return current task ID ...
96 return 0;
97 }
98
uffs_GetCurDateTime(void)99 unsigned int uffs_GetCurDateTime(void)
100 {
101 // FIXME: return system time, please modify this for your platform !
102 // or just return 0 if you don't care about file time.
103 time_t tvalue;
104
105 tvalue = time(NULL);
106
107 return (unsigned int)tvalue;
108 }
109
110 #if CONFIG_USE_SYSTEM_MEMORY_ALLOCATOR > 0
sys_malloc(struct uffs_DeviceSt * dev,unsigned int size)111 static void * sys_malloc(struct uffs_DeviceSt *dev, unsigned int size)
112 {
113 dev = dev;
114 uffs_Perror(UFFS_MSG_NORMAL, "system memory alloc %d bytes", size);
115 return malloc(size);
116 }
117
sys_free(struct uffs_DeviceSt * dev,void * p)118 static URET sys_free(struct uffs_DeviceSt *dev, void *p)
119 {
120 dev = dev;
121 free(p);
122 return U_SUCC;
123 }
124
uffs_MemSetupSystemAllocator(uffs_MemAllocator * allocator)125 void uffs_MemSetupSystemAllocator(uffs_MemAllocator *allocator)
126 {
127 allocator->malloc = sys_malloc;
128 allocator->free = sys_free;
129 }
130 #endif
131
132
133 /* debug message output throught 'printf' */
134 static void output_dbg_msg(const char *msg);
135 static struct uffs_DebugMsgOutputSt m_dbg_ops = {
136 output_dbg_msg,
137 NULL,
138 };
139
output_dbg_msg(const char * msg)140 static void output_dbg_msg(const char *msg)
141 {
142 printf("%s", msg);
143 }
144
uffs_SetupDebugOutput(void)145 void uffs_SetupDebugOutput(void)
146 {
147 uffs_InitDebugMessageOutput(&m_dbg_ops, UFFS_MSG_NOISY);
148 }
149