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vscclient: use glib thread primitives not qemu 

Use glib-provided thread primitives in vscclient instead of
qemu ones, and do not use qemu sockets in there (open-code
call to WSAStartup() for windows to initialize things).

This way, vscclient becomes more stand-alone, independent on
qemu internals.

Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Reviewed-by: Alon Levy <alevy@redhat.com>
Tested-by: Alon Levy <alevy@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Michael Tokarev 2014-05-08 12:30:47 +04:00 committed by Paolo Bonzini
parent 86946a2d83
commit 2a0c46da96
1 changed files with 37 additions and 33 deletions
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70
libcacard/vscclient.c
View File

@ -12,12 +12,10 @@
#ifndef _WIN32
#include <netdb.h>
#define closesocket(x) close(x)
#endif
#include <glib.h>
#include "qemu-common.h"
#include "qemu/thread.h"
#include "qemu/sockets.h"
#include "vscard_common.h"
@ -54,7 +52,7 @@ print_usage(void) {
static GIOChannel *channel_socket;
static GByteArray *socket_to_send;
static QemuMutex socket_to_send_lock;
static CompatGMutex socket_to_send_lock;
static guint socket_tag;
static void
@ -103,7 +101,7 @@ send_msg(
) {
VSCMsgHeader mhHeader;
qemu_mutex_lock(&socket_to_send_lock);
g_mutex_lock(&socket_to_send_lock);
if (verbose > 10) {
printf("sending type=%d id=%u, len =%u (0x%x)\n",
@ -117,18 +115,18 @@ send_msg(
g_byte_array_append(socket_to_send, (guint8 *)msg, length);
g_idle_add(socket_prepare_sending, NULL);
qemu_mutex_unlock(&socket_to_send_lock);
g_mutex_unlock(&socket_to_send_lock);
return 0;
}
static VReader *pending_reader;
static QemuMutex pending_reader_lock;
static QemuCond pending_reader_condition;
static CompatGMutex pending_reader_lock;
static CompatGCond pending_reader_condition;
#define MAX_ATR_LEN 40
static void *
event_thread(void *arg)
static gpointer
event_thread(gpointer arg)
{
unsigned char atr[MAX_ATR_LEN];
int atr_len;
@ -149,20 +147,20 @@ event_thread(void *arg)
/* ignore events from readers qemu has rejected */
/* if qemu is still deciding on this reader, wait to see if need to
* forward this event */
qemu_mutex_lock(&pending_reader_lock);
g_mutex_lock(&pending_reader_lock);
if (!pending_reader || (pending_reader != event->reader)) {
/* wasn't for a pending reader, this reader has already been
* rejected by qemu */
qemu_mutex_unlock(&pending_reader_lock);
g_mutex_unlock(&pending_reader_lock);
vevent_delete(event);
continue;
}
/* this reader hasn't been told its status from qemu yet, wait for
* that status */
while (pending_reader != NULL) {
qemu_cond_wait(&pending_reader_condition, &pending_reader_lock);
g_cond_wait(&pending_reader_condition, &pending_reader_lock);
}
qemu_mutex_unlock(&pending_reader_lock);
g_mutex_unlock(&pending_reader_lock);
/* now recheck the id */
reader_id = vreader_get_id(event->reader);
if (reader_id == VSCARD_UNDEFINED_READER_ID) {
@ -178,12 +176,12 @@ event_thread(void *arg)
/* wait until qemu has responded to our first reader insert
* before we send a second. That way we won't confuse the responses
* */
qemu_mutex_lock(&pending_reader_lock);
g_mutex_lock(&pending_reader_lock);
while (pending_reader != NULL) {
qemu_cond_wait(&pending_reader_condition, &pending_reader_lock);
g_cond_wait(&pending_reader_condition, &pending_reader_lock);
}
pending_reader = vreader_reference(event->reader);
qemu_mutex_unlock(&pending_reader_lock);
g_mutex_unlock(&pending_reader_lock);
reader_name = vreader_get_name(event->reader);
if (verbose > 10) {
printf(" READER INSERT: %s\n", reader_name);
@ -246,7 +244,6 @@ on_host_init(VSCMsgHeader *mhHeader, VSCMsgInit *incoming)
int num_capabilities =
1 + ((mhHeader->length - sizeof(VSCMsgInit)) / sizeof(uint32_t));
int i;
QemuThread thread_id;
incoming->version = ntohl(incoming->version);
if (incoming->version != VSCARD_VERSION) {
@ -269,7 +266,7 @@ on_host_init(VSCMsgHeader *mhHeader, VSCMsgInit *incoming)
send_msg(VSC_ReaderRemove, VSCARD_MINIMAL_READER_ID, NULL, 0);
/* launch the event_thread. This will trigger reader adds for all the
* existing readers */
qemu_thread_create(&thread_id, "vsc/event", event_thread, NULL, 0);
g_thread_new("vsc/event", event_thread, NULL);
return 0;
}
@ -379,26 +376,26 @@ do_socket_read(GIOChannel *source,
case VSC_Error:
error_msg = (VSCMsgError *) pbSendBuffer;
if (error_msg->code == VSC_SUCCESS) {
qemu_mutex_lock(&pending_reader_lock);
g_mutex_lock(&pending_reader_lock);
if (pending_reader) {
vreader_set_id(pending_reader, mhHeader.reader_id);
vreader_free(pending_reader);
pending_reader = NULL;
qemu_cond_signal(&pending_reader_condition);
g_cond_signal(&pending_reader_condition);
}
qemu_mutex_unlock(&pending_reader_lock);
g_mutex_unlock(&pending_reader_lock);
break;
}
printf("warning: qemu refused to add reader\n");
if (error_msg->code == VSC_CANNOT_ADD_MORE_READERS) {
/* clear pending reader, qemu can't handle any more */
qemu_mutex_lock(&pending_reader_lock);
g_mutex_lock(&pending_reader_lock);
if (pending_reader) {
pending_reader = NULL;
/* make sure the event loop doesn't hang */
qemu_cond_signal(&pending_reader_condition);
g_cond_signal(&pending_reader_condition);
}
qemu_mutex_unlock(&pending_reader_lock);
g_mutex_unlock(&pending_reader_lock);
}
break;
case VSC_Init:
@ -601,7 +598,7 @@ connect_to_qemu(
struct addrinfo *server;
int ret, sock;
sock = qemu_socket(AF_INET, SOCK_STREAM, 0);
sock = socket(AF_INET, SOCK_STREAM, 0);
if (sock < 0) {
/* Error */
fprintf(stderr, "Error opening socket!\n");
@ -654,8 +651,20 @@ main(
int cert_count = 0;
int c, sock;
if (socket_init() != 0)
#ifdef _WIN32
WSADATA Data;
if (WSAStartup(MAKEWORD(2, 2), &Data) != 0) {
c = WSAGetLastError();
fprintf(stderr, "WSAStartup: %d\n", c);
return 1;
}
#endif
#if !GLIB_CHECK_VERSION(2, 31, 0)
if (!g_thread_supported()) {
g_thread_init(NULL);
}
#endif
while ((c = getopt(argc, argv, "c:e:pd:")) != -1) {
switch (c) {
@ -722,13 +731,8 @@ main(
}
socket_to_send = g_byte_array_new();
qemu_mutex_init(&socket_to_send_lock);
qemu_mutex_init(&pending_reader_lock);
qemu_cond_init(&pending_reader_condition);
vcard_emul_init(command_line_options);
loop = g_main_loop_new(NULL, true);
loop = g_main_loop_new(NULL, TRUE);
printf("> ");
fflush(stdout);