io: io_set_alloc()

[ccan] / ccan / io / io.c

diff --git a/ccan/io/io.c b/ccan/io/io.c
index 76f1f441740476fc52dbf5dc1fc378bc16e16be1..e2dd44430b79d0f3a0977a92861cb72a86f56df6 100644 (file)
--- a/ccan/io/io.c
+++ b/ccan/io/io.c
@@ -14,6 +14,10 @@
 
 void *io_loop_return;
 
+struct io_alloc io_alloc = {
+       malloc, realloc, free
+};
+
 #ifdef DEBUG
 /* Set to skip the next plan. */
 bool io_plan_nodebug;
@@ -50,7 +54,7 @@ struct io_plan io_debug(struct io_plan plan)
                if (!ready->plan.next) {
                        /* Call finish function immediately. */
                        if (ready->finish) {
-                               errno = ready->plan.u.close.saved_errno;
+                               errno = ready->plan.u1.s;
                                ready->finish(ready, ready->finish_arg);
                                ready->finish = NULL;
                        }
@@ -125,7 +129,7 @@ struct io_listener *io_new_listener_(int fd,
                                     void (*init)(int fd, void *arg),
                                     void *arg)
 {
-       struct io_listener *l = malloc(sizeof(*l));
+       struct io_listener *l = io_alloc.alloc(sizeof(*l));
 
        if (!l)
                return NULL;
@@ -135,7 +139,7 @@ struct io_listener *io_new_listener_(int fd,
        l->init = init;
        l->arg = arg;
        if (!add_listener(l)) {
-               free(l);
+               io_alloc.free(l);
                return NULL;
        }
        return l;
@@ -145,12 +149,12 @@ void io_close_listener(struct io_listener *l)
 {
        close(l->fd.fd);
        del_listener(l);
-       free(l);
+       io_alloc.free(l);
 }
 
 struct io_conn *io_new_conn_(int fd, struct io_plan plan)
 {
-       struct io_conn *conn = malloc(sizeof(*conn));
+       struct io_conn *conn = io_alloc.alloc(sizeof(*conn));
 
        io_plan_debug_again();
 
@@ -165,7 +169,7 @@ struct io_conn *io_new_conn_(int fd, struct io_plan plan)
        conn->duplex = NULL;
        conn->timeout = NULL;
        if (!add_conn(conn)) {
-               free(conn);
+               io_alloc.free(conn);
                return NULL;
        }
        return conn;
@@ -187,7 +191,7 @@ struct io_conn *io_duplex_(struct io_conn *old, struct io_plan plan)
 
        assert(!old->duplex);
 
-       conn = malloc(sizeof(*conn));
+       conn = io_alloc.alloc(sizeof(*conn));
        if (!conn)
                return NULL;
 
@@ -199,7 +203,7 @@ struct io_conn *io_duplex_(struct io_conn *old, struct io_plan plan)
        conn->finish_arg = NULL;
        conn->timeout = NULL;
        if (!add_duplex(conn)) {
-               free(conn);
+               io_alloc.free(conn);
                return NULL;
        }
        old->duplex = conn;
@@ -212,7 +216,7 @@ bool io_timeout_(struct io_conn *conn, struct timespec ts,
        assert(cb);
 
        if (!conn->timeout) {
-               conn->timeout = malloc(sizeof(*conn->timeout));
+               conn->timeout = io_alloc.alloc(sizeof(*conn->timeout));
                if (!conn->timeout)
                        return false;
        } else
@@ -227,13 +231,13 @@ bool io_timeout_(struct io_conn *conn, struct timespec ts,
 /* Returns true if we're finished. */
 static int do_write(int fd, struct io_plan *plan)
 {
-       ssize_t ret = write(fd, plan->u.write.buf, plan->u.write.len);
+       ssize_t ret = write(fd, plan->u1.cp, plan->u2.s);
        if (ret < 0)
                return io_debug_io(-1);
 
-       plan->u.write.buf += ret;
-       plan->u.write.len -= ret;
-       return io_debug_io(plan->u.write.len == 0);
+       plan->u1.cp += ret;
+       plan->u2.s -= ret;
+       return io_debug_io(plan->u2.s == 0);
 }
 
 /* Queue some data to be written. */
@@ -244,8 +248,8 @@ struct io_plan io_write_(const void *data, size_t len,
        struct io_plan plan;
 
        assert(cb);
-       plan.u.write.buf = data;
-       plan.u.write.len = len;
+       plan.u1.const_vp = data;
+       plan.u2.s = len;
        plan.io = do_write;
        plan.next = cb;
        plan.next_arg = arg;
@@ -256,13 +260,13 @@ struct io_plan io_write_(const void *data, size_t len,
 
 static int do_read(int fd, struct io_plan *plan)
 {
-       ssize_t ret = read(fd, plan->u.read.buf, plan->u.read.len);
+       ssize_t ret = read(fd, plan->u1.cp, plan->u2.s);
        if (ret <= 0)
                return io_debug_io(-1);
 
-       plan->u.read.buf += ret;
-       plan->u.read.len -= ret;
-       return io_debug_io(plan->u.read.len == 0);
+       plan->u1.cp += ret;
+       plan->u2.s -= ret;
+       return io_debug_io(plan->u2.s == 0);
 }
 
 /* Queue a request to read into a buffer. */
@@ -273,8 +277,8 @@ struct io_plan io_read_(void *data, size_t len,
        struct io_plan plan;
 
        assert(cb);
-       plan.u.read.buf = data;
-       plan.u.read.len = len;
+       plan.u1.cp = data;
+       plan.u2.s = len;
        plan.io = do_read;
        plan.next = cb;
        plan.next_arg = arg;
@@ -285,11 +289,11 @@ struct io_plan io_read_(void *data, size_t len,
 
 static int do_read_partial(int fd, struct io_plan *plan)
 {
-       ssize_t ret = read(fd, plan->u.readpart.buf, *plan->u.readpart.lenp);
+       ssize_t ret = read(fd, plan->u1.cp, *(size_t *)plan->u2.vp);
        if (ret <= 0)
                return io_debug_io(-1);
 
-       *plan->u.readpart.lenp = ret;
+       *(size_t *)plan->u2.vp = ret;
        return io_debug_io(1);
 }
 
@@ -301,8 +305,8 @@ struct io_plan io_read_partial_(void *data, size_t *len,
        struct io_plan plan;
 
        assert(cb);
-       plan.u.readpart.buf = data;
-       plan.u.readpart.lenp = len;
+       plan.u1.cp = data;
+       plan.u2.vp = len;
        plan.io = do_read_partial;
        plan.next = cb;
        plan.next_arg = arg;
@@ -313,11 +317,11 @@ struct io_plan io_read_partial_(void *data, size_t *len,
 
 static int do_write_partial(int fd, struct io_plan *plan)
 {
-       ssize_t ret = write(fd, plan->u.writepart.buf, *plan->u.writepart.lenp);
+       ssize_t ret = write(fd, plan->u1.cp, *(size_t *)plan->u2.vp);
        if (ret < 0)
                return io_debug_io(-1);
 
-       *plan->u.writepart.lenp = ret;
+       *(size_t *)plan->u2.vp = ret;
        return io_debug_io(1);
 }
 
@@ -329,8 +333,8 @@ struct io_plan io_write_partial_(const void *data, size_t *len,
        struct io_plan plan;
 
        assert(cb);
-       plan.u.writepart.buf = data;
-       plan.u.writepart.lenp = len;
+       plan.u1.const_vp = data;
+       plan.u2.vp = len;
        plan.io = do_write_partial;
        plan.next = cb;
        plan.next_arg = arg;
@@ -356,7 +360,7 @@ static int do_connect(int fd, struct io_plan *plan)
 
        if (err == 0) {
                /* Restore blocking if it was initially. */
-               fcntl(fd, F_SETFD, plan->u.len_len.len1);
+               fcntl(fd, F_SETFD, plan->u1.s);
                return 1;
        }
        return 0;
@@ -374,8 +378,8 @@ struct io_plan io_connect_(int fd, const struct addrinfo *addr,
        plan.next_arg = arg;
 
        /* Save old flags, set nonblock if not already. */
-       plan.u.len_len.len1 = fcntl(fd, F_GETFD);
-       fcntl(fd, F_SETFD, plan.u.len_len.len1 | O_NONBLOCK);
+       plan.u1.s = fcntl(fd, F_GETFD);
+       fcntl(fd, F_SETFD, plan.u1.s | O_NONBLOCK);
 
        /* Immediate connect can happen. */
        if (connect(fd, addr->ai_addr, addr->ai_addrlen) == 0) {
@@ -447,7 +451,7 @@ struct io_plan io_close_(void)
        plan.pollflag = 0;
        /* This means we're closing. */
        plan.next = NULL;
-       plan.u.close.saved_errno = errno;
+       plan.u1.s = errno;
 
        return plan;
 }
@@ -467,3 +471,12 @@ struct io_plan io_break_(void *ret, struct io_plan plan)
 
        return plan;
 }
+
+void io_set_alloc(void *(*allocfn)(size_t size),
+                 void *(*reallocfn)(void *ptr, size_t size),
+                 void (*freefn)(void *ptr))
+{
+       io_alloc.alloc = allocfn;
+       io_alloc.realloc = reallocfn;
+       io_alloc.free = freefn;
+}