Revision d0f2c4c6 buffered_file.c
| b/buffered_file.c | ||
|---|---|---|
| 39 | 39 |
} QEMUFileBuffered; |
| 40 | 40 |
|
| 41 | 41 |
#ifdef DEBUG_BUFFERED_FILE |
| 42 |
#define dprintf(fmt, ...) \
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#define DPRINTF(fmt, ...) \
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do { printf("buffered-file: " fmt, ## __VA_ARGS__); } while (0)
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| 44 | 44 |
#else |
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#define dprintf(fmt, ...) \
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#define DPRINTF(fmt, ...) \
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do { } while (0)
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| 47 | 47 |
#endif |
| 48 | 48 |
|
| ... | ... | |
| 52 | 52 |
if (size > (s->buffer_capacity - s->buffer_size)) {
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| 53 | 53 |
void *tmp; |
| 54 | 54 |
|
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dprintf("increasing buffer capacity from %zu by %zu\n",
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DPRINTF("increasing buffer capacity from %zu by %zu\n",
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s->buffer_capacity, size + 1024); |
| 57 | 57 |
|
| 58 | 58 |
s->buffer_capacity += size + 1024; |
| ... | ... | |
| 75 | 75 |
size_t offset = 0; |
| 76 | 76 |
|
| 77 | 77 |
if (s->has_error) {
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dprintf("flush when error, bailing\n");
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DPRINTF("flush when error, bailing\n");
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| 79 | 79 |
return; |
| 80 | 80 |
} |
| 81 | 81 |
|
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dprintf("flushing %zu byte(s) of data\n", s->buffer_size);
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DPRINTF("flushing %zu byte(s) of data\n", s->buffer_size);
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| 83 | 83 |
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| 84 | 84 |
while (offset < s->buffer_size) {
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| 85 | 85 |
ssize_t ret; |
| ... | ... | |
| 87 | 87 |
ret = s->put_buffer(s->opaque, s->buffer + offset, |
| 88 | 88 |
s->buffer_size - offset); |
| 89 | 89 |
if (ret == -EAGAIN) {
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dprintf("backend not ready, freezing\n");
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DPRINTF("backend not ready, freezing\n");
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s->freeze_output = 1; |
| 92 | 92 |
break; |
| 93 | 93 |
} |
| 94 | 94 |
|
| 95 | 95 |
if (ret <= 0) {
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dprintf("error flushing data, %zd\n", ret);
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DPRINTF("error flushing data, %zd\n", ret);
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| 97 | 97 |
s->has_error = 1; |
| 98 | 98 |
break; |
| 99 | 99 |
} else {
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dprintf("flushed %zd byte(s)\n", ret);
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DPRINTF("flushed %zd byte(s)\n", ret);
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| 101 | 101 |
offset += ret; |
| 102 | 102 |
} |
| 103 | 103 |
} |
| 104 | 104 |
|
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dprintf("flushed %zu of %zu byte(s)\n", offset, s->buffer_size);
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DPRINTF("flushed %zu of %zu byte(s)\n", offset, s->buffer_size);
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| 106 | 106 |
memmove(s->buffer, s->buffer + offset, s->buffer_size - offset); |
| 107 | 107 |
s->buffer_size -= offset; |
| 108 | 108 |
} |
| ... | ... | |
| 113 | 113 |
int offset = 0; |
| 114 | 114 |
ssize_t ret; |
| 115 | 115 |
|
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dprintf("putting %d bytes at %" PRId64 "\n", size, pos);
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DPRINTF("putting %d bytes at %" PRId64 "\n", size, pos);
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| 117 | 117 |
|
| 118 | 118 |
if (s->has_error) {
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dprintf("flush when error, bailing\n");
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DPRINTF("flush when error, bailing\n");
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| 120 | 120 |
return -EINVAL; |
| 121 | 121 |
} |
| 122 | 122 |
|
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dprintf("unfreezing output\n");
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DPRINTF("unfreezing output\n");
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| 124 | 124 |
s->freeze_output = 0; |
| 125 | 125 |
|
| 126 | 126 |
buffered_flush(s); |
| 127 | 127 |
|
| 128 | 128 |
while (!s->freeze_output && offset < size) {
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| 129 | 129 |
if (s->bytes_xfer > s->xfer_limit) {
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dprintf("transfer limit exceeded when putting\n");
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DPRINTF("transfer limit exceeded when putting\n");
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break; |
| 132 | 132 |
} |
| 133 | 133 |
|
| 134 | 134 |
ret = s->put_buffer(s->opaque, buf + offset, size - offset); |
| 135 | 135 |
if (ret == -EAGAIN) {
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dprintf("backend not ready, freezing\n");
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DPRINTF("backend not ready, freezing\n");
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| 137 | 137 |
s->freeze_output = 1; |
| 138 | 138 |
break; |
| 139 | 139 |
} |
| 140 | 140 |
|
| 141 | 141 |
if (ret <= 0) {
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dprintf("error putting\n");
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DPRINTF("error putting\n");
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| 143 | 143 |
s->has_error = 1; |
| 144 | 144 |
offset = -EINVAL; |
| 145 | 145 |
break; |
| 146 | 146 |
} |
| 147 | 147 |
|
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dprintf("put %zd byte(s)\n", ret);
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DPRINTF("put %zd byte(s)\n", ret);
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| 149 | 149 |
offset += ret; |
| 150 | 150 |
s->bytes_xfer += ret; |
| 151 | 151 |
} |
| 152 | 152 |
|
| 153 | 153 |
if (offset >= 0) {
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dprintf("buffering %d bytes\n", size - offset);
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DPRINTF("buffering %d bytes\n", size - offset);
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| 155 | 155 |
buffered_append(s, buf + offset, size - offset); |
| 156 | 156 |
offset = size; |
| 157 | 157 |
} |
| ... | ... | |
| 164 | 164 |
QEMUFileBuffered *s = opaque; |
| 165 | 165 |
int ret; |
| 166 | 166 |
|
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dprintf("closing\n");
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DPRINTF("closing\n");
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| 168 | 168 |
|
| 169 | 169 |
while (!s->has_error && s->buffer_size) {
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| 170 | 170 |
buffered_flush(s); |
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