60 lines
1.1 KiB
C
60 lines
1.1 KiB
C
#include <mango/status.h>
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#include <xpc/buffer.h>
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#include <xpc/msg.h>
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kern_status_t xpc_buffer_read(
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const xpc_buffer_t *buf,
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void *out,
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size_t max,
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size_t *nr_read)
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{
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if ((buf->buf_flags & (XPC_BUFFER_F_IN | XPC_BUFFER_F_REMOTE))
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!= (XPC_BUFFER_F_IN | XPC_BUFFER_F_REMOTE)) {
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return KERN_BAD_STATE;
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}
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size_t to_read = max;
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if (to_read > buf->buf_len) {
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to_read = buf->buf_len;
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}
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kern_status_t status
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= xpc_msg_read(buf->buf_origin, buf->buf_offset, out, to_read);
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if (status != KERN_OK) {
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return status;
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}
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/* TODO */
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*nr_read = to_read;
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return KERN_OK;
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}
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kern_status_t xpc_buffer_write(
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xpc_buffer_t *buf,
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const void *in,
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size_t len,
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size_t *nr_written)
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{
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if ((buf->buf_flags & (XPC_BUFFER_F_OUT | XPC_BUFFER_F_REMOTE))
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!= (XPC_BUFFER_F_OUT | XPC_BUFFER_F_REMOTE)) {
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return KERN_BAD_STATE;
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}
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size_t to_write = len;
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if (to_write > buf->buf_max) {
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to_write = buf->buf_max;
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}
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kern_status_t status
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= xpc_msg_write(buf->buf_origin, buf->buf_offset, in, to_write);
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if (status != KERN_OK) {
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return status;
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}
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/* TODO */
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*nr_written = to_write;
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return KERN_OK;
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}
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