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-rw-r--r--state.c612
1 files changed, 612 insertions, 0 deletions
diff --git a/state.c b/state.c
new file mode 100644
index 0000000..5aabf0e
--- /dev/null
+++ b/state.c
@@ -0,0 +1,612 @@
+/* See LICENSE file for copyright and license details. */
+#include "state.h"
+#include "util.h"
+
+#include <inttypes.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+
+/**
+ * The name of the process
+ */
+char *restrict argv0; /* do not marshal */
+
+/**
+ * The real pathname of the process's binary,
+ * `NULL` if `argv0` is satisfactory
+ */
+char *restrict argv0_real = NULL;
+
+/**
+ * Array of all outputs
+ */
+struct output *restrict outputs = NULL;
+
+/**
+ * The nubmer of elements in `outputs`
+ */
+size_t outputs_n = 0;
+
+/**
+ * The server socket's file descriptor
+ */
+int socketfd = -1;
+
+/**
+ * Has the process receive a signal
+ * telling it to re-execute?
+ */
+volatile sig_atomic_t reexec = 0; /* do not marshal */
+
+/**
+ * Has the process receive a signal
+ * telling it to terminate?
+ */
+volatile sig_atomic_t terminate = 0; /* do not marshal */
+
+/**
+ * Has the process receive a to
+ * disconnect from or reconnect to
+ * the site? 1 if disconnect, 2 if
+ * reconnect, 0 otherwise.
+ */
+volatile sig_atomic_t connection = 0;
+
+/**
+ * List of all client's file descriptors
+ *
+ * Unused slots, with index less than `connections_used`,
+ * should have the value -1 (negative)
+ */
+int *restrict connections = NULL;
+
+/**
+ * The number of elements allocated for `connections`
+ */
+size_t connections_alloc = 0;
+
+/**
+ * The index of the first unused slot in `connections`
+ */
+size_t connections_ptr = 0;
+
+/**
+ * The index of the last used slot in `connections`, plus 1
+ */
+size_t connections_used = 0;
+
+/**
+ * The clients' connections' inbound-message buffers
+ */
+struct message *restrict inbound = NULL;
+
+/**
+ * The clients' connections' outbound-message buffers
+ */
+struct ring *restrict outbound = NULL;
+
+/**
+ * Is the server connect to the display?
+ *
+ * Set to true before the initial connection
+ */
+int connected = 1;
+
+/**
+ * The adjustment method, -1 for automatic
+ */
+int method = -1;
+
+/**
+ * The site's name, may be `NULL`
+ */
+char *restrict sitename = NULL;
+
+/**
+ * The libgamma site state
+ */
+libgamma_site_state_t site; /* do not marshal */
+
+/**
+ * The libgamma partition states
+ */
+libgamma_partition_state_t *restrict partitions = NULL; /* do not marshal */
+
+/**
+ * The libgamma CRTC states
+ */
+libgamma_crtc_state_t *restrict crtcs = NULL; /* do not marshal */
+
+/**
+ * Preserve gamma ramps at priority 0?
+ */
+int preserve = 0;
+
+
+/**
+ * As part of a state dump, dump one or two gamma ramp-trios
+ *
+ * @param left The left ramps
+ * @param right The right ramps
+ * @param depth The gamma ramp type/depth
+ * @param have_right Print right ramps?
+ * @param indent Print indent
+ */
+static void
+ramps_dump(union gamma_ramps *left, union gamma_ramps *right, signed depth, int have_right, const char *indent)
+{
+#define STRINGISE(SIDE, CH, N, BUF)\
+ do {\
+ if (!SIDE || !SIDE->u8.CH) {\
+ strcpy(BUF, "null");\
+ } else if (i < N) {\
+ switch (depth) {\
+ case -2: snprintf(BUF, sizeof(BUF), "%lf", SIDE->d.CH[i]); break;\
+ case -1: snprintf(BUF, sizeof(BUF), "%f", (double)(SIDE->f.CH[i])); break;\
+ case 8: snprintf(BUF, sizeof(BUF), "%02" PRIx8, SIDE->u8.CH[i]); break;\
+ case 16: snprintf(BUF, sizeof(BUF), "%04" PRIx16, SIDE->u16.CH[i]); break;\
+ case 32: snprintf(BUF, sizeof(BUF), "%08" PRIx32, SIDE->u32.CH[i]); break;\
+ case 64: snprintf(BUF, sizeof(BUF), "%16" PRIx64, SIDE->u64.CH[i]); break;\
+ default:\
+ strcpy(BUF, "corrupt state");\
+ break;\
+ }\
+ }\
+ } while (0)
+
+ char lr[320], lg[320], lb[320], rr[320], rg[320], rb[320];
+ size_t rn = left ? left->u8.red_size : right ? right->u8.red_size : 0;
+ size_t gn = left ? left->u8.green_size : right ? right->u8.green_size : 0;
+ size_t bn = left ? left->u8.blue_size : right ? right->u8.blue_size : 0;
+ size_t i, n = rn > gn ? rn : gn;
+ n = n > bn ? n : bn;
+
+ for (i = 0; i < n; i++) {
+ *lr = *lg = *lb = *rr = *rg = *rb = '\0';
+
+ STRINGISE(left, red, rn, lr);
+ STRINGISE(left, green, gn, lg);
+ STRINGISE(left, blue, bn, lb);
+
+ if (have_right) {
+ STRINGISE(right, red, rn, rr);
+ STRINGISE(right, green, gn, rg);
+ STRINGISE(right, blue, bn, rb);
+ }
+
+ if (have_right)
+ fprintf(stderr, "%s%zu: %s, %s, %s :: %s, %s, %s\n", indent, i, lr, lg, lb, rr, rg, rb);
+ else
+ fprintf(stderr, "%s%zu: %s, %s, %s\n", indent, i, lr, lg, lb);
+ }
+}
+
+
+/**
+ * Dump the state to stderr
+ */
+void
+state_dump(void)
+{
+ size_t i, j;
+ struct output *restrict out;
+ const char *str;
+ struct filter *restrict filter;
+ union gamma_ramps left;
+ size_t depth;
+
+ fprintf(stderr, "argv0: %s\n", argv0 ? argv0 : "(null)");
+ fprintf(stderr, "Realpath of argv0: %s\n", argv0_real ? argv0_real : "(null)");
+ fprintf(stderr, "Calibrations preserved: %s\n", preserve ? "yes" : "no");
+ fprintf(stderr, "Connected: %s\n", connected ? "yes" : "no");
+ fprintf(stderr, "Socket FD: %i\n", socketfd);
+ fprintf(stderr, "Re-execution pending: %s\n", reexec ? "yes" : "no");
+ fprintf(stderr, "Termination pending: %s\n", terminate ? "yes" : "no");
+ if (0 <= connection && connection <= 2)
+ fprintf(stderr, "Pending connection change: %s\n",
+ connection == 0 ? "none" : connection == 1 ? "disconnect" : "reconnect");
+ else
+ fprintf(stderr, "Pending connection change: %i (CORRUPT STATE)\n", connection);
+ fprintf(stderr, "Adjustment method: %i\n", method);
+ fprintf(stderr, "Site name: %s\n", sitename ? sitename : "(automatic)");
+ fprintf(stderr, "Clients:\n");
+ fprintf(stderr, " Next empty slot: %zu\n", connections_ptr);
+ fprintf(stderr, " Initialised slots: %zu\n", connections_used);
+ fprintf(stderr, " Allocated slots: %zu\n", connections_alloc);
+ if (!connections) {
+ fprintf(stderr, " File descriptor array is null\n");
+ } else {
+ for (i = 0; i < connections_used; i++) {
+ if (connections[i] < 0) {
+ fprintf(stderr, " Slot %zu: empty\n", i);
+ continue;
+ }
+ fprintf(stderr, " Slot %zu:\n", i);
+ fprintf(stderr, " File descriptor: %i\n", connections[i]);
+ if (!inbound) {
+ fprintf(stderr, " Inbound message array is null\n");
+ } else {
+ fprintf(stderr, " Inbound message:\n");
+ fprintf(stderr, " Header array: %s\n", inbound[i].headers ? "non-null" : "null");
+ fprintf(stderr, " Headers: %zu\n", inbound[i].header_count);
+ fprintf(stderr, " Payload buffer: %s\n", inbound[i].payload ? "non-null" : "null");
+ fprintf(stderr, " Payload size: %zu\n", inbound[i].payload_size);
+ fprintf(stderr, " Payload write pointer: %zu\n", inbound[i].payload_ptr);
+ fprintf(stderr, " Message buffer: %s\n", inbound[i].buffer ? "non-null" : "null");
+ fprintf(stderr, " Message buffer size: %zu\n", inbound[i].buffer_size);
+ fprintf(stderr, " Message buffer write pointer: %zu\n", inbound[i].buffer_ptr);
+ fprintf(stderr, " Read stage: %i\n", inbound[i].stage);
+ }
+ if (!outbound) {
+ fprintf(stderr, " Outbound message array is null\n");
+ } else {
+ fprintf(stderr, " Ring buffer: %s\n", outbound[i].buffer ? "non-null" : "null");
+ fprintf(stderr, " Head: %zu\n", outbound[i].end);
+ fprintf(stderr, " Tail: %zu\n", outbound[i].start);
+ fprintf(stderr, " Size: %zu\n", outbound[i].size);
+ }
+ }
+ }
+ fprintf(stderr, "Partition array: %s\n", partitions ? "non-null" : "null");
+ fprintf(stderr, "CRTC array: %s\n", crtcs ? "non-null" : "null");
+ fprintf(stderr, "Output:\n");
+ fprintf(stderr, " Output count: %zu\n", outputs_n);
+ if (!outputs) {
+ fprintf(stderr, " Output array is null\n");
+ } else {
+ for (i = 0; i < outputs_n; i++) {
+ out = outputs + i;
+ fprintf(stderr, " Output %zu:\n", i);
+ fprintf(stderr, " Depth: %i (%s)\n", out->depth,
+ out->depth == -1 ? "float" :
+ out->depth == -2 ? "double" :
+ out->depth == 8 ? "uint8_t" :
+ out->depth == 16 ? "uint16_t" :
+ out->depth == 32 ? "uint32_t" :
+ out->depth == 64 ? "uint64_t" : "CORRUPT STATE");
+ fprintf(stderr, " Gamma supported: %s (%u)\n",
+ out->supported == LIBGAMMA_YES ? "yes" :
+ out->supported == LIBGAMMA_NO ? "no" :
+ out->supported == LIBGAMMA_MAYBE ? "maybe" :
+ "CORRUPT STATE", out->supported);
+ fprintf(stderr, " Name is EDID: %s\n", out->name_is_edid ? "yes" : "no");
+ switch (out->colourspace) {
+ case COLOURSPACE_UNKNOWN: str = "unknown"; break;
+ case COLOURSPACE_SRGB: str = "sRGB with explicit gamut"; break;
+ case COLOURSPACE_SRGB_SANS_GAMUT: str = "sRGB with implicit gamut (actually illegal)"; break;
+ case COLOURSPACE_RGB: str = "RGB other than sRGB, with unknown gamut"; break;
+ case COLOURSPACE_RGB_SANS_GAMUT: str = "RGB other than sRGB, with listed gamut"; break;
+ case COLOURSPACE_NON_RGB: str = "Non-RGB multicolour"; break;
+ case COLOURSPACE_GREY: str = "Monochrome or singlecolour scale"; break;
+ default: str = "CORRUPT STATE"; break;
+ }
+ fprintf(stderr, " Colourspace: %s (%u)\n", str, out->colourspace);
+ if (out->colourspace == COLOURSPACE_SRGB || out->colourspace == COLOURSPACE_RGB) {
+ fprintf(stderr, " Red (x, y): (%u / 1024, %u / 1024)\n", out->red_x, out->red_y);
+ fprintf(stderr, " Green (x, y): (%u / 1024, %u / 1024)\n", out->green_x, out->green_y);
+ fprintf(stderr, " Blue (x, y): (%u / 1024, %u / 1024)\n", out->blue_x, out->blue_y);
+ fprintf(stderr, " White (x, y): (%u / 1024, %u / 1024)\n", out->white_x, out->white_y);
+ if (out->colourspace == COLOURSPACE_SRGB) {
+ fprintf(stderr, " Expected red (x, y): (655 / 1024, 338 / 1024)\n");
+ fprintf(stderr, " Expected green (x, y): (307 / 1024, 614 / 1024)\n");
+ fprintf(stderr, " Expected blue (x, y): (154 / 1024, 61 / 1024)\n");
+ fprintf(stderr, " Expected white (x, y): (320 / 1024, 337 / 1024)\n");
+ }
+ }
+ if (out->supported) {
+ fprintf(stderr, " Gamma ramp size:\n");
+ fprintf(stderr, " Red: %zu stops\n", out->red_size);
+ fprintf(stderr, " Green: %zu stops\n", out->green_size);
+ fprintf(stderr, " Blue: %zu stops\n", out->blue_size);
+ fprintf(stderr, " Total: %zu bytes\n", out->ramps_size);
+ fprintf(stderr, " Name: %s\n", out->name ? out->name : "(null)");
+ fprintf(stderr, " CRTC state: %s\n", out->crtc ? "non-null" : "null");
+ fprintf(stderr, " Saved gamma ramps (stop: red, green, blue):\n");
+ ramps_dump(&out->saved_ramps, NULL, out->depth, 0, " ");
+ fprintf(stderr, " Filter table:\n");
+ fprintf(stderr, " Filter count: %zu\n", out->table_size);
+ fprintf(stderr, " Slots allocated: %zu\n", out->table_alloc);
+ if (out->table_size > 0) {
+ if (!out->table_filters)
+ fprintf(stderr, " Filter table is null\n");
+ if (!out->table_sums)
+ fprintf(stderr, " Result table is null\n");
+ }
+ for (j = 0; j < out->table_size; j++) {
+ filter = out->table_filters ? out->table_filters + j : NULL;
+ fprintf(stderr, " Filter %zu:\n", j);
+ if (filter) {
+ if (filter->lifespan == LIFESPAN_UNTIL_DEATH)
+ fprintf(stderr, " Client FD: %i\n", filter->client);
+ switch (filter->lifespan) {
+ case LIFESPAN_REMOVE: str = "remove (ILLEGAL STATE)"; break;
+ case LIFESPAN_UNTIL_REMOVAL: str = "until-removal"; break;
+ case LIFESPAN_UNTIL_DEATH: str = "until-death"; break;
+ default: str = "CORRUPT STATE"; break;
+ }
+ fprintf(stderr, " Lifespan: %s (%u)\n", str, filter->lifespan);
+ fprintf(stderr, " Priority: %"PRIi64"\n", filter->priority);
+ fprintf(stderr, " Class: %s\n", filter->class ? filter->class : "(null)");
+ str = "yes";
+ if (!filter->class)
+ str = "no, is NULL";
+ else if (strchr(filter->class, '\n'))
+ str = "no, contains LF";
+ else if (!strstr(filter->class, "::"))
+ str = "no, does not contain \"::\"";
+ else if (!strstr(strstr(filter->class, "::") + 2, "::"))
+ str = "no, contains only one \"::\"";
+ else if (verify_utf8(filter->class) < 0)
+ str = "no, not UTF-8";
+ fprintf(stderr, " Class legal: %s\n", str);
+ if (!filter->ramps && filter->lifespan != LIFESPAN_REMOVE)
+ fprintf(stderr, " Ramps are NULL\n");
+ }
+ if (filter ? filter->lifespan != LIFESPAN_REMOVE : !!out->table_sums) {
+ switch (out->depth) {
+ case -2:
+ depth = sizeof(double);
+ break;
+ case -1:
+ depth = sizeof(float);
+ break;
+ case 8: case 16: case 32: case 64:
+ depth = (size_t)(out->depth) / 8;
+ break;
+ default:
+ goto corrupt_depth;
+ }
+ if (filter && filter->ramps) {
+ left.u8.red_size = out->red_size;
+ left.u8.green_size = out->green_size;
+ left.u8.blue_size = out->blue_size;
+ left.u8.red = filter->ramps;
+ left.u8.green = left.u8.red + out->red_size * depth;
+ left.u8.blue = left.u8.green + out->green_size * depth;
+ }
+ fprintf(stderr, " Ramps (stop: filter red, green, blue :: "
+ "composite red, geen, blue):\n");
+ ramps_dump((filter && filter->ramps) ? &left : NULL,
+ out->table_sums ? out->table_sums + j : NULL,
+ out->depth, 1, " ");
+ corrupt_depth:;
+ }
+ }
+ }
+ }
+ }
+}
+
+
+/**
+ * Destroy the state
+ */
+void
+state_destroy(void)
+{
+ size_t i;
+
+ for (i = 0; i < connections_used; i++) {
+ if (connections[i] >= 0) {
+ message_destroy(inbound + i);
+ ring_destroy(outbound + i);
+ }
+ }
+ free(inbound);
+ free(outbound);
+ free(connections);
+
+ if (outputs)
+ for (i = 0; i < outputs_n; i++)
+ output_destroy(outputs + i);
+ free(outputs);
+
+ if (crtcs)
+ for (i = 0; i < outputs_n; i++)
+ libgamma_crtc_destroy(crtcs + i);
+ free(crtcs);
+
+ if (partitions)
+ for (i = 0; i < site.partitions_available; i++)
+ libgamma_partition_destroy(partitions + i);
+ free(partitions);
+
+ libgamma_site_destroy(&site);
+ free(sitename);
+}
+
+
+#if defined(__clang__)
+# pragma GCC diagnostic push
+# pragma GCC diagnostic ignored "-Wcast-align"
+#endif
+
+
+/**
+ * Marshal the state
+ *
+ * @param buf Output buffer for the marshalled data,
+ * `NULL` to only measure how many bytes
+ * this buffer needs
+ * @return The number of marshalled bytes
+ */
+size_t
+state_marshal(void *restrict buf)
+{
+ size_t off = 0, i, n;
+ char *restrict bs = buf;
+
+ if (!argv0_real) {
+ if (bs)
+ bs[off] = '\0';
+ off += 1;
+ } else {
+ n = strlen(argv0_real) + 1;
+ if (bs)
+ memcpy(&bs[off], argv0_real, n);
+ off += n;
+ }
+
+ if (bs)
+ *(size_t *)&bs[off] = outputs_n;
+ off += sizeof(size_t);
+
+ for (i = 0; i < outputs_n; i++)
+ off += output_marshal(outputs + i, bs ? &bs[off] : NULL);
+
+ if (bs)
+ *(int *)&bs[off] = socketfd;
+ off += sizeof(int);
+
+ if (bs)
+ *(sig_atomic_t *)&bs[off] = connection;
+ off += sizeof(sig_atomic_t);
+
+ if (bs)
+ *(int *)&bs[off] = connected;
+ off += sizeof(int);
+
+ if (bs)
+ *(size_t *)&bs[off] = connections_ptr;
+ off += sizeof(size_t);
+
+ if (bs)
+ *(size_t *)&bs[off] = connections_used;
+ off += sizeof(size_t);
+
+ if (bs)
+ memcpy(&bs[off], connections, connections_used * sizeof(*connections));
+ off += connections_used * sizeof(*connections);
+
+ for (i = 0; i < connections_used; i++) {
+ if (connections[i] >= 0) {
+ off += message_marshal(&inbound[i], bs ? &bs[off] : NULL);
+ off += ring_marshal(&outbound[i], bs ? &bs[off] : NULL);
+ }
+ }
+
+ if (bs)
+ *(int *)&bs[off] = method;
+ off += sizeof(int);
+
+ if (bs)
+ *(int *)&bs[off] = sitename != NULL;
+ off += sizeof(int);
+ if (sitename) {
+ n = strlen(sitename) + 1;
+ if (bs)
+ memcpy(&bs[off], sitename, n);
+ off += n;
+ }
+
+ if (bs)
+ *(int *)&bs[off] = preserve;
+ off += sizeof(int);
+
+ return off;
+}
+
+
+/**
+ * Unmarshal the state
+ *
+ * @param buf Buffer for the marshalled data
+ * @return The number of unmarshalled bytes, 0 on error
+ */
+size_t
+state_unmarshal(const void *restrict buf)
+{
+ size_t off = 0, i, n;
+ const char *restrict bs = buf;
+
+ connections = NULL;
+ inbound = NULL;
+
+ if (bs[off]) {
+ n = strlen(&bs[off]) + 1;
+ if (!(argv0_real = memdup(&bs[off], n)))
+ return 0;
+ off += n;
+ } else {
+ off += 1;
+ }
+
+ outputs_n = *(const size_t *)&bs[off];
+ off += sizeof(size_t);
+
+ outputs = calloc(outputs_n, sizeof(*outputs));
+ if (!outputs)
+ return 0;
+
+ for (i = 0; i < outputs_n; i++) {
+ off += n = output_unmarshal(outputs + i, &bs[off]);
+ if (!n)
+ return 0;
+ }
+
+ socketfd = *(const int *)&bs[off];
+ off += sizeof(int);
+
+ connection = *(const sig_atomic_t *)&bs[off];
+ off += sizeof(sig_atomic_t);
+
+ connected = *(const int *)&bs[off];
+ off += sizeof(int);
+
+ connections_ptr = *(const size_t *)&bs[off];
+ off += sizeof(size_t);
+
+ connections_alloc = connections_used = *(const size_t *)&bs[off];
+ off += sizeof(size_t);
+
+ if (connections_used > 0) {
+ connections = memdup(&bs[off], connections_used * sizeof(*connections));
+ if (!connections)
+ return 0;
+ off += connections_used * sizeof(*connections);
+
+ inbound = malloc(connections_used * sizeof(*inbound));
+ if (!inbound)
+ return 0;
+
+ outbound = malloc(connections_used * sizeof(*outbound));
+ if (!outbound)
+ return 0;
+ }
+
+ for (i = 0; i < connections_used; i++) {
+ if (connections[i] >= 0) {
+ off += n = message_unmarshal(&inbound[i], &bs[off]);
+ if (!n)
+ return 0;
+ off += n = ring_unmarshal(&outbound[i], &bs[off]);
+ if (!n)
+ return 0;
+ }
+ }
+
+ method = *(const int *)&bs[off];
+ off += sizeof(int);
+
+ if (*(const int *)&bs[off]) {
+ off += sizeof(int);
+ n = strlen(&bs[off]) + 1;
+ if (!(sitename = memdup(&bs[off], n)))
+ return 0;
+ off += n;
+ } else {
+ off += sizeof(int);
+ }
+
+ preserve = *(const int *)&bs[off];
+ off += sizeof(int);
+
+ return off;
+}
+
+
+#if defined(__clang__)
+# pragma GCC diagnostic pop
+#endif