Annotation of qemu/os-win32.c, revision 1.1.1.2

1.1       root        1: /*
                      2:  * os-win32.c
                      3:  *
                      4:  * Copyright (c) 2003-2008 Fabrice Bellard
                      5:  * Copyright (c) 2010 Red Hat, Inc.
                      6:  *
                      7:  * Permission is hereby granted, free of charge, to any person obtaining a copy
                      8:  * of this software and associated documentation files (the "Software"), to deal
                      9:  * in the Software without restriction, including without limitation the rights
                     10:  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
                     11:  * copies of the Software, and to permit persons to whom the Software is
                     12:  * furnished to do so, subject to the following conditions:
                     13:  *
                     14:  * The above copyright notice and this permission notice shall be included in
                     15:  * all copies or substantial portions of the Software.
                     16:  *
                     17:  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
                     18:  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
                     19:  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
                     20:  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
                     21:  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
                     22:  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
                     23:  * THE SOFTWARE.
                     24:  */
                     25: #include <windows.h>
                     26: #include <unistd.h>
                     27: #include <fcntl.h>
                     28: #include <signal.h>
                     29: #include <time.h>
                     30: #include <errno.h>
                     31: #include <sys/time.h>
                     32: #include "config-host.h"
                     33: #include "sysemu.h"
                     34: #include "qemu-options.h"
                     35: 
                     36: /***********************************************************/
1.1.1.2 ! root       37: /* Functions missing in mingw */
        !            38: 
        !            39: int setenv(const char *name, const char *value, int overwrite)
        !            40: {
        !            41:     int result = 0;
        !            42:     if (overwrite || !getenv(name)) {
        !            43:         size_t length = strlen(name) + strlen(value) + 2;
        !            44:         char *string = qemu_malloc(length);
        !            45:         snprintf(string, length, "%s=%s", name, value);
        !            46:         result = putenv(string);
        !            47:     }
        !            48:     return result;
        !            49: }
        !            50: 
        !            51: /***********************************************************/
1.1       root       52: /* Polling handling */
                     53: 
                     54: typedef struct PollingEntry {
                     55:     PollingFunc *func;
                     56:     void *opaque;
                     57:     struct PollingEntry *next;
                     58: } PollingEntry;
                     59: 
                     60: static PollingEntry *first_polling_entry;
                     61: 
                     62: int qemu_add_polling_cb(PollingFunc *func, void *opaque)
                     63: {
                     64:     PollingEntry **ppe, *pe;
                     65:     pe = qemu_mallocz(sizeof(PollingEntry));
                     66:     pe->func = func;
                     67:     pe->opaque = opaque;
                     68:     for(ppe = &first_polling_entry; *ppe != NULL; ppe = &(*ppe)->next);
                     69:     *ppe = pe;
                     70:     return 0;
                     71: }
                     72: 
                     73: void qemu_del_polling_cb(PollingFunc *func, void *opaque)
                     74: {
                     75:     PollingEntry **ppe, *pe;
                     76:     for(ppe = &first_polling_entry; *ppe != NULL; ppe = &(*ppe)->next) {
                     77:         pe = *ppe;
                     78:         if (pe->func == func && pe->opaque == opaque) {
                     79:             *ppe = pe->next;
                     80:             qemu_free(pe);
                     81:             break;
                     82:         }
                     83:     }
                     84: }
                     85: 
                     86: /***********************************************************/
                     87: /* Wait objects support */
                     88: typedef struct WaitObjects {
                     89:     int num;
                     90:     HANDLE events[MAXIMUM_WAIT_OBJECTS + 1];
                     91:     WaitObjectFunc *func[MAXIMUM_WAIT_OBJECTS + 1];
                     92:     void *opaque[MAXIMUM_WAIT_OBJECTS + 1];
                     93: } WaitObjects;
                     94: 
                     95: static WaitObjects wait_objects = {0};
                     96: 
                     97: int qemu_add_wait_object(HANDLE handle, WaitObjectFunc *func, void *opaque)
                     98: {
                     99:     WaitObjects *w = &wait_objects;
                    100: 
                    101:     if (w->num >= MAXIMUM_WAIT_OBJECTS)
                    102:         return -1;
                    103:     w->events[w->num] = handle;
                    104:     w->func[w->num] = func;
                    105:     w->opaque[w->num] = opaque;
                    106:     w->num++;
                    107:     return 0;
                    108: }
                    109: 
                    110: void qemu_del_wait_object(HANDLE handle, WaitObjectFunc *func, void *opaque)
                    111: {
                    112:     int i, found;
                    113:     WaitObjects *w = &wait_objects;
                    114: 
                    115:     found = 0;
                    116:     for (i = 0; i < w->num; i++) {
                    117:         if (w->events[i] == handle)
                    118:             found = 1;
                    119:         if (found) {
                    120:             w->events[i] = w->events[i + 1];
                    121:             w->func[i] = w->func[i + 1];
                    122:             w->opaque[i] = w->opaque[i + 1];
                    123:         }
                    124:     }
                    125:     if (found)
                    126:         w->num--;
                    127: }
                    128: 
                    129: void os_host_main_loop_wait(int *timeout)
                    130: {
                    131:     int ret, ret2, i;
                    132:     PollingEntry *pe;
                    133: 
                    134:     /* XXX: need to suppress polling by better using win32 events */
                    135:     ret = 0;
                    136:     for(pe = first_polling_entry; pe != NULL; pe = pe->next) {
                    137:         ret |= pe->func(pe->opaque);
                    138:     }
                    139:     if (ret == 0) {
                    140:         int err;
                    141:         WaitObjects *w = &wait_objects;
                    142: 
                    143:         ret = WaitForMultipleObjects(w->num, w->events, FALSE, *timeout);
                    144:         if (WAIT_OBJECT_0 + 0 <= ret && ret <= WAIT_OBJECT_0 + w->num - 1) {
                    145:             if (w->func[ret - WAIT_OBJECT_0])
                    146:                 w->func[ret - WAIT_OBJECT_0](w->opaque[ret - WAIT_OBJECT_0]);
                    147: 
                    148:             /* Check for additional signaled events */
                    149:             for(i = (ret - WAIT_OBJECT_0 + 1); i < w->num; i++) {
                    150: 
                    151:                 /* Check if event is signaled */
                    152:                 ret2 = WaitForSingleObject(w->events[i], 0);
                    153:                 if(ret2 == WAIT_OBJECT_0) {
                    154:                     if (w->func[i])
                    155:                         w->func[i](w->opaque[i]);
                    156:                 } else if (ret2 == WAIT_TIMEOUT) {
                    157:                 } else {
                    158:                     err = GetLastError();
                    159:                     fprintf(stderr, "WaitForSingleObject error %d %d\n", i, err);
                    160:                 }
                    161:             }
                    162:         } else if (ret == WAIT_TIMEOUT) {
                    163:         } else {
                    164:             err = GetLastError();
                    165:             fprintf(stderr, "WaitForMultipleObjects error %d %d\n", ret, err);
                    166:         }
                    167:     }
                    168: 
                    169:     *timeout = 0;
                    170: }
                    171: 
                    172: static BOOL WINAPI qemu_ctrl_handler(DWORD type)
                    173: {
                    174:     exit(STATUS_CONTROL_C_EXIT);
                    175:     return TRUE;
                    176: }
                    177: 
                    178: void os_setup_early_signal_handling(void)
                    179: {
                    180:     /* Note: cpu_interrupt() is currently not SMP safe, so we force
                    181:        QEMU to run on a single CPU */
                    182:     HANDLE h;
                    183:     DWORD mask, smask;
                    184:     int i;
                    185: 
                    186:     SetConsoleCtrlHandler(qemu_ctrl_handler, TRUE);
                    187: 
                    188:     h = GetCurrentProcess();
                    189:     if (GetProcessAffinityMask(h, &mask, &smask)) {
                    190:         for(i = 0; i < 32; i++) {
                    191:             if (mask & (1 << i))
                    192:                 break;
                    193:         }
                    194:         if (i != 32) {
                    195:             mask = 1 << i;
                    196:             SetProcessAffinityMask(h, mask);
                    197:         }
                    198:     }
                    199: }
                    200: 
                    201: /* Look for support files in the same directory as the executable.  */
                    202: char *os_find_datadir(const char *argv0)
                    203: {
                    204:     char *p;
                    205:     char buf[MAX_PATH];
                    206:     DWORD len;
                    207: 
                    208:     len = GetModuleFileName(NULL, buf, sizeof(buf) - 1);
                    209:     if (len == 0) {
                    210:         return NULL;
                    211:     }
                    212: 
                    213:     buf[len] = 0;
                    214:     p = buf + len - 1;
                    215:     while (p != buf && *p != '\\')
                    216:         p--;
                    217:     *p = 0;
                    218:     if (access(buf, R_OK) == 0) {
                    219:         return qemu_strdup(buf);
                    220:     }
                    221:     return NULL;
                    222: }
                    223: 
1.1.1.2 ! root      224: void os_set_line_buffering(void)
        !           225: {
        !           226:     setbuf(stdout, NULL);
        !           227:     setbuf(stderr, NULL);
        !           228: }
        !           229: 
1.1       root      230: /*
                    231:  * Parse OS specific command line options.
                    232:  * return 0 if option handled, -1 otherwise
                    233:  */
                    234: void os_parse_cmd_args(int index, const char *optarg)
                    235: {
                    236:     return;
                    237: }
                    238: 
                    239: void os_pidfile_error(void)
                    240: {
                    241:     fprintf(stderr, "Could not acquire pid file: %s\n", strerror(errno));
                    242: }
1.1.1.2 ! root      243: 
        !           244: int qemu_create_pidfile(const char *filename)
        !           245: {
        !           246:     char buffer[128];
        !           247:     int len;
        !           248:     HANDLE file;
        !           249:     OVERLAPPED overlap;
        !           250:     BOOL ret;
        !           251:     memset(&overlap, 0, sizeof(overlap));
        !           252: 
        !           253:     file = CreateFile(filename, GENERIC_WRITE, FILE_SHARE_READ, NULL,
        !           254:                      OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
        !           255: 
        !           256:     if (file == INVALID_HANDLE_VALUE) {
        !           257:         return -1;
        !           258:     }
        !           259:     len = snprintf(buffer, sizeof(buffer), "%ld\n", (long)getpid());
        !           260:     ret = WriteFileEx(file, (LPCVOID)buffer, (DWORD)len,
        !           261:                      &overlap, NULL);
        !           262:     if (ret == 0) {
        !           263:         return -1;
        !           264:     }
        !           265:     return 0;
        !           266: }

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