summaryrefslogtreecommitdiffstatshomepage
path: root/src/osd/modules/sync/sync_ntc.cpp
blob: c78f67ce64a8cfb87e9713d65b80f7d56cfffd77 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
// license:BSD-3-Clause
// copyright-holders:Olivier Galibert, R. Belmont
//============================================================
//
//  sdlsync.c - SDL core synchronization functions
//
//  SDLMAME by Olivier Galibert and R. Belmont
//
//============================================================

#ifndef _GNU_SOURCE
#define _GNU_SOURCE     // for PTHREAD_MUTEX_RECURSIVE; needs to be here before other glibc headers are included
#endif

#include "sdlinc.h"

#ifdef SDLMAME_MACOSX
#include <mach/mach.h>
#include <signal.h>
#endif

#if defined(SDLMAME_NETBSD) || defined(SDLMAME_OPENBSD)
/* for SIGKILL */
#include <signal.h>
#endif

// standard C headers
#include <math.h>
#include <unistd.h>

// MAME headers
#include "osdcore.h"
#include "osdsync.h"

#include "eminline.h"

#include <pthread.h>
#include <errno.h>
#include <sys/time.h>

struct osd_event {
	pthread_mutex_t     mutex;
	pthread_cond_t      cond;
	volatile INT32      autoreset;
	volatile INT32      signalled;
#ifdef PTR64
	INT8                padding[40];    // Fill a 64-byte cache line
#else
	INT8                padding[48];    // A bit more padding
#endif
};


//============================================================
//  TYPE DEFINITIONS
//============================================================

struct osd_thread {
	pthread_t           thread;
};

//============================================================
//  osd_event_alloc
//============================================================

osd_event *osd_event_alloc(int manualreset, int initialstate)
{
	osd_event *ev;
	pthread_mutexattr_t mtxattr;

	ev = (osd_event *)calloc(1, sizeof(osd_event));
	if (ev == NULL)
		return NULL;

	pthread_mutexattr_init(&mtxattr);
	pthread_mutex_init(&ev->mutex, &mtxattr);
	pthread_cond_init(&ev->cond, NULL);
	ev->signalled = initialstate;
	ev->autoreset = !manualreset;

	return ev;
}

//============================================================
//  osd_event_free
//============================================================

void osd_event_free(osd_event *event)
{
	pthread_mutex_destroy(&event->mutex);
	pthread_cond_destroy(&event->cond);
	free(event);
}

//============================================================
//  osd_event_set
//============================================================

void osd_event_set(osd_event *event)
{
	pthread_mutex_lock(&event->mutex);
	if (event->signalled == FALSE)
	{
		event->signalled = TRUE;
		if (event->autoreset)
			pthread_cond_signal(&event->cond);
		else
			pthread_cond_broadcast(&event->cond);
	}
	pthread_mutex_unlock(&event->mutex);
}

//============================================================
//  osd_event_reset
//============================================================

void osd_event_reset(osd_event *event)
{
	pthread_mutex_lock(&event->mutex);
	event->signalled = FALSE;
	pthread_mutex_unlock(&event->mutex);
}

//============================================================
//  osd_event_wait
//============================================================

int osd_event_wait(osd_event *event, osd_ticks_t timeout)
{
	if (timeout == OSD_EVENT_WAIT_INFINITE)
		timeout = osd_ticks_per_second() * (osd_ticks_t)10000;

	pthread_mutex_lock(&event->mutex);
	if (!timeout)
	{
		if (!event->signalled)
		{
				pthread_mutex_unlock(&event->mutex);
				return FALSE;
		}
	}
	else
	{
		if (!event->signalled)
		{
			struct timespec   ts;
			struct timeval    tp;
			UINT64 msec = timeout * 1000 / osd_ticks_per_second();
			UINT64 nsec;

			gettimeofday(&tp, NULL);

			ts.tv_sec  = tp.tv_sec;
			nsec = (UINT64) tp.tv_usec * (UINT64) 1000 + (msec * (UINT64) 1000000);
			ts.tv_nsec = nsec % (UINT64) 1000000000;
			ts.tv_sec += nsec / (UINT64) 1000000000;

			do {
				int ret = pthread_cond_timedwait(&event->cond, &event->mutex, &ts);
				if ( ret == ETIMEDOUT )
				{
					if (!event->signalled)
					{
						pthread_mutex_unlock(&event->mutex);
						return FALSE;
					}
					else
						break;
				}
				if (ret == 0)
					break;
				if ( ret != EINTR)
				{
					printf("Error %d while waiting for pthread_cond_timedwait:  %s\n", ret, strerror(ret));
				}

			} while (TRUE);
		}
	}

	if (event->autoreset)
		event->signalled = 0;

	pthread_mutex_unlock(&event->mutex);

	return TRUE;
}

//============================================================
//  osd_thread_create
//============================================================

osd_thread *osd_thread_create(osd_thread_callback callback, void *cbparam)
{
	osd_thread *thread;
	pthread_attr_t  attr;

	thread = (osd_thread *)calloc(1, sizeof(osd_thread));
	if (thread == NULL)
		return NULL;
	pthread_attr_init(&attr);
#ifndef SDLMAME_HAIKU
	pthread_attr_setinheritsched(&attr, PTHREAD_INHERIT_SCHED);
#endif
	if ( pthread_create(&thread->thread, &attr, callback, cbparam) != 0 )
	{
		free(thread);
		return NULL;
	}
	return thread;
}

//============================================================
//  osd_thread_adjust_priority
//============================================================

int osd_thread_adjust_priority(osd_thread *thread, int adjust)
{
	struct sched_param  sched;
	int                 policy;

	if ( pthread_getschedparam( thread->thread, &policy, &sched ) == 0 )
	{
		sched.sched_priority += adjust;
		if ( pthread_setschedparam(thread->thread, policy, &sched ) == 0)
			return TRUE;
		else
			return FALSE;
	}
	else
		return FALSE;
}

//============================================================
//  osd_thread_cpu_affinity
//============================================================

int osd_thread_cpu_affinity(osd_thread *thread, UINT32 mask)
{
	return TRUE;
}

//============================================================
//  osd_thread_wait_free
//============================================================

void osd_thread_wait_free(osd_thread *thread)
{
	pthread_join(thread->thread, NULL);
	free(thread);
}