WebSVN – HelenOS – Diff – /tags/0.2.0.2/uspace/libc/generic/io/stream.c


/*
 * Copyright (C) 2006 Josef Cejka
 * Copyright (C) 2006 Jakub Vana
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
/** @addtogroup libc
 * @{
 */
/** @file
 */
 
 
#include <io/io.h>
#include <io/stream.h>
#include <string.h>
#include <malloc.h>
#include <libc.h>
#include <ipc/ipc.h>
#include <ipc/ns.h>
#include <ipc/fb.h>
#include <ipc/services.h>
#include <console.h>
#include <unistd.h>
#include <async.h>
 
#define FDS 32
 
typedef struct stream_t {
    pwritefn_t w;
    preadfn_t r;
    void * param;
    int phone;
} stream_t;
 
static int console_phone = -1;
static stream_t streams[FDS];
 
static ssize_t write_stderr(void *param, const void *buf, size_t count)
{
    return count;
}
 
static ssize_t read_stdin(void *param, void *buf, size_t count)
{
    ipcarg_t r0,r1;
    size_t i = 0;
 
    while (i < count) {
        if (async_req_2(streams[0].phone, CONSOLE_GETCHAR, 0, 0, &r0, &r1) < 0) {
            return -1;
        }
        ((char *) buf)[i++] = r0;
    }
    return i;
}
 
static ssize_t write_stdout(void *param, const void *buf, size_t count)
{
    int i;
 
    for (i = 0; i < count; i++)
        async_msg(streams[1].phone, CONSOLE_PUTCHAR, ((const char *) buf)[i]);
   
    return count;
}
 
 
static stream_t open_stdin(void)
{
    stream_t stream;
   
    if (console_phone < 0) {
        while ((console_phone = ipc_connect_me_to(PHONE_NS, SERVICE_CONSOLE, 0)) < 0) {
            usleep(10000);
        }
    }
   
    stream.r = read_stdin;
    stream.w = NULL;
    stream.param = 0;
    stream.phone = console_phone;
   
    return stream;
}
 
static stream_t open_stdout(void)
{
    stream_t stream;
 
    if (console_phone < 0) {
        while ((console_phone = ipc_connect_me_to(PHONE_NS, SERVICE_CONSOLE, 0)) < 0) {
            usleep(10000);
        }
    }
   
    stream.r = NULL;
    stream.w = write_stdout;
    stream.phone = console_phone;
    stream.param = 0;
   
    return stream;
}
 
static ssize_t write_null(void *param, const void *buf, size_t count)
{
    return count;
}
 
 
fd_t open(const char *fname, int flags)
{
    int c = 0;
 
    while (((streams[c].w) || (streams[c].r)) && (c < FDS))
        c++;
   
    if (c == FDS)
        return EMFILE;
   
    if (!strcmp(fname, "stdin")) {
        streams[c] = open_stdin();
        return c;
    }
   
    if (!strcmp(fname, "stdout")) {
        streams[c] = open_stdout();
        return c;
    }
   
    if (!strcmp(fname, "stderr")) {
        streams[c].w = write_stderr;
        return c;
    }
   
    if (!strcmp(fname, "null")) {
        streams[c].w = write_null;
        return c;
    }
   
    return -1;
}
 
 
ssize_t write(int fd, const void *buf, size_t count)
{
//  __SYSCALL3(SYS_IO, 1, (sysarg_t)buf, (sysarg_t) count);
//  return count;
    if (fd < FDS)
        return streams[fd].w(streams[fd].param, buf, count);
   
    return 0;
}
 
ssize_t read(int fd, void *buf, size_t count)
{
    if (fd < FDS)
        return streams[fd].r(streams[fd].param, buf, count);
   
    return 0;
}
 
int get_fd_phone(int fd)
{
    if (fd >= FDS || fd < 0)
        return -1;
    return streams[fd].phone;
}
 
 
/** @}
 */
 

Rev 1966	Rev 1968
1	/*	1	/*
2	* Copyright (C) 2006 Josef Cejka	2	* Copyright (C) 2006 Josef Cejka
3	* Copyright (C) 2006 Jakub Vana	3	* Copyright (C) 2006 Jakub Vana
4	* All rights reserved.	4	* All rights reserved.
5	*	5	*
6	* Redistribution and use in source and binary forms, with or without	6	* Redistribution and use in source and binary forms, with or without
7	* modification, are permitted provided that the following conditions	7	* modification, are permitted provided that the following conditions
8	* are met:	8	* are met:
9	*	9	*
10	* - Redistributions of source code must retain the above copyright	10	* - Redistributions of source code must retain the above copyright
11	* notice, this list of conditions and the following disclaimer.	11	* notice, this list of conditions and the following disclaimer.
12	* - Redistributions in binary form must reproduce the above copyright	12	* - Redistributions in binary form must reproduce the above copyright
13	* notice, this list of conditions and the following disclaimer in the	13	* notice, this list of conditions and the following disclaimer in the
14	* documentation and/or other materials provided with the distribution.	14	* documentation and/or other materials provided with the distribution.
15	* - The name of the author may not be used to endorse or promote products	15	* - The name of the author may not be used to endorse or promote products
16	* derived from this software without specific prior written permission.	16	* derived from this software without specific prior written permission.
17	*	17	*
18	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	18	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	19	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	20	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	21	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	22	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	23	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	27	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	28	*/
29		29
30	/** @addtogroup libc	30	/** @addtogroup libc
31	* @{	31	* @{
32	*/	32	*/
33	/** @file	33	/** @file
34	*/	34	*/
35		35
36		36
37	#include <io/io.h>	37	#include <io/io.h>
38	#include <io/stream.h>	38	#include <io/stream.h>
39	#include <string.h>	39	#include <string.h>
40	#include <malloc.h>	40	#include <malloc.h>
41	#include <libc.h>	41	#include <libc.h>
42	#include <ipc/ipc.h>	42	#include <ipc/ipc.h>
43	#include <ipc/ns.h>	43	#include <ipc/ns.h>
44	#include <ipc/fb.h>	44	#include <ipc/fb.h>
45	#include <ipc/services.h>	45	#include <ipc/services.h>
46	#include <console.h>	46	#include <console.h>
47	#include <unistd.h>	47	#include <unistd.h>
48	#include <async.h>	48	#include <async.h>
49		49
50	#define FDS 32	50	#define FDS 32
51		51
52	typedef struct stream_t {	52	typedef struct stream_t {
53	pwritefn_t w;	53	pwritefn_t w;
54	preadfn_t r;	54	preadfn_t r;
55	void * param;	55	void * param;
56	int phone;	56	int phone;
57	} stream_t;	57	} stream_t;
58		58
59	static int console_phone = -1;	59	static int console_phone = -1;
60	static stream_t streams[FDS];	60	static stream_t streams[FDS];
61		61
62	static ssize_t write_stderr(void param, const void buf, size_t count)	62	static ssize_t write_stderr(void param, const void buf, size_t count)
63	{	63	{
64	return count;	64	return count;
65	}	65	}
66		66
67	static ssize_t read_stdin(void param, void buf, size_t count)	67	static ssize_t read_stdin(void param, void buf, size_t count)
68	{	68	{
69	ipcarg_t r0,r1;	69	ipcarg_t r0,r1;
70	size_t i = 0;	70	size_t i = 0;
71		71
72	while (i < count) {	72	while (i < count) {
73	if (async_req_2(streams[0].phone, CONSOLE_GETCHAR, 0, 0, &r0, &r1) < 0) {	73	if (async_req_2(streams[0].phone, CONSOLE_GETCHAR, 0, 0, &r0, &r1) < 0) {
74	return -1;	74	return -1;
75	}	75	}
76	((char *) buf)[i++] = r0;	76	((char *) buf)[i++] = r0;
77	}	77	}
78	return i;	78	return i;
79	}	79	}
80		80
81	static ssize_t write_stdout(void param, const void buf, size_t count)	81	static ssize_t write_stdout(void param, const void buf, size_t count)
82	{	82	{
83	int i;	83	int i;
84		84
85	for (i = 0; i < count; i++)	85	for (i = 0; i < count; i++)
86	async_msg(streams[1].phone, CONSOLE_PUTCHAR, ((const char *) buf)[i]);	86	async_msg(streams[1].phone, CONSOLE_PUTCHAR, ((const char *) buf)[i]);
87		87
88	return count;	88	return count;
89	}	89	}
90		90
91		91
92	static stream_t open_stdin(void)	92	static stream_t open_stdin(void)
93	{	93	{
94	stream_t stream;	94	stream_t stream;
95		95
96	if (console_phone < 0) {	96	if (console_phone < 0) {
97	while ((console_phone = ipc_connect_me_to(PHONE_NS, SERVICE_CONSOLE, 0)) < 0) {	97	while ((console_phone = ipc_connect_me_to(PHONE_NS, SERVICE_CONSOLE, 0)) < 0) {
98	usleep(10000);	98	usleep(10000);
99	}	99	}
100	}	100	}
101		101
102	stream.r = read_stdin;	102	stream.r = read_stdin;
103	stream.w = NULL;	103	stream.w = NULL;
104	stream.param = 0;	104	stream.param = 0;
105	stream.phone = console_phone;	105	stream.phone = console_phone;
106		106
107	return stream;	107	return stream;
108	}	108	}
109		109
110	static stream_t open_stdout(void)	110	static stream_t open_stdout(void)
111	{	111	{
112	stream_t stream;	112	stream_t stream;
113		113
114	if (console_phone < 0) {	114	if (console_phone < 0) {
115	while ((console_phone = ipc_connect_me_to(PHONE_NS, SERVICE_CONSOLE, 0)) < 0) {	115	while ((console_phone = ipc_connect_me_to(PHONE_NS, SERVICE_CONSOLE, 0)) < 0) {
116	usleep(10000);	116	usleep(10000);
117	}	117	}
118	}	118	}
119		119
120	stream.r = NULL;	120	stream.r = NULL;
121	stream.w = write_stdout;	121	stream.w = write_stdout;
122	stream.phone = console_phone;	122	stream.phone = console_phone;
123	stream.param = 0;	123	stream.param = 0;
124		124
125	return stream;	125	return stream;
126	}	126	}
127		127
128	static ssize_t write_null(void param, const void buf, size_t count)	128	static ssize_t write_null(void param, const void buf, size_t count)
129	{	129	{
130	return count;	130	return count;
131	}	131	}
132		132
133		133
134	fd_t open(const char *fname, int flags)	134	fd_t open(const char *fname, int flags)
135	{	135	{
136	int c = 0;	136	int c = 0;
137		137
138	while (((streams[c].w) \|\| (streams[c].r)) && (c < FDS))	138	while (((streams[c].w) \|\| (streams[c].r)) && (c < FDS))
139	c++;	139	c++;
140		140
141	if (c == FDS)	141	if (c == FDS)
142	return EMFILE;	142	return EMFILE;
143		143
144	if (!strcmp(fname, "stdin")) {	144	if (!strcmp(fname, "stdin")) {
145	streams[c] = open_stdin();	145	streams[c] = open_stdin();
146	return c;	146	return c;
147	}	147	}
148		148
149	if (!strcmp(fname, "stdout")) {	149	if (!strcmp(fname, "stdout")) {
150	streams[c] = open_stdout();	150	streams[c] = open_stdout();
151	return c;	151	return c;
152	}	152	}
153		153
154	if (!strcmp(fname, "stderr")) {	154	if (!strcmp(fname, "stderr")) {
155	streams[c].w = write_stderr;	155	streams[c].w = write_stderr;
156	return c;	156	return c;
157	}	157	}
158		158
159	if (!strcmp(fname, "null")) {	159	if (!strcmp(fname, "null")) {
160	streams[c].w = write_null;	160	streams[c].w = write_null;
161	return c;	161	return c;
162	}	162	}
163		163
164	return -1;	164	return -1;
165	}	165	}
166		166
167		167
168	ssize_t write(int fd, const void *buf, size_t count)	168	ssize_t write(int fd, const void *buf, size_t count)
169	{	169	{
170	// __SYSCALL3(SYS_IO, 1, (sysarg_t)buf, (sysarg_t) count);	170	// __SYSCALL3(SYS_IO, 1, (sysarg_t)buf, (sysarg_t) count);
171	// return count;	171	// return count;
172	if (fd < FDS)	172	if (fd < FDS)
173	return streams[fd].w(streams[fd].param, buf, count);	173	return streams[fd].w(streams[fd].param, buf, count);
174		174
175	return 0;	175	return 0;
176	}	176	}
177		177
178	ssize_t read(int fd, void *buf, size_t count)	178	ssize_t read(int fd, void *buf, size_t count)
179	{	179	{
180	if (fd < FDS)	180	if (fd < FDS)
181	return streams[fd].r(streams[fd].param, buf, count);	181	return streams[fd].r(streams[fd].param, buf, count);
182		182
183	return 0;	183	return 0;
184	}	184	}
185		185
186	int get_fd_phone(int fd)	186	int get_fd_phone(int fd)
187	{	187	{
188	if (fd >= FDS \|\| fd < 0)	188	if (fd >= FDS \|\| fd < 0)
189	return -1;	189	return -1;
190	return streams[fd].phone;	190	return streams[fd].phone;
191	}	191	}
192		192
193		193
194	/** @}	194	/** @}
195	*/	195	*/
196		196

Subversion Repositories HelenOS

(root)/tags/0.2.0.2/uspace/libc/generic/io/stream.c – Rev 1966 → 1968