added sketchybar config

dot_config/sketchybar/helpers/event_providers/cpu_load/cpu.h

@@ -0,0 +1,58 @@
+#include <mach/mach.h>
+#include <stdbool.h>
+#include <unistd.h>
+#include <stdio.h>
+
+struct cpu {
+  host_t host;
+  mach_msg_type_number_t count;
+  host_cpu_load_info_data_t load;
+  host_cpu_load_info_data_t prev_load;
+  bool has_prev_load;
+
+  int user_load;
+  int sys_load;
+  int total_load;
+};
+
+static inline void cpu_init(struct cpu* cpu) {
+  cpu->host = mach_host_self();
+  cpu->count = HOST_CPU_LOAD_INFO_COUNT;
+  cpu->has_prev_load = false;
+}
+
+static inline void cpu_update(struct cpu* cpu) {
+  kern_return_t error = host_statistics(cpu->host,
+                                        HOST_CPU_LOAD_INFO,
+                                        (host_info_t)&cpu->load,
+                                        &cpu->count                );
+
+  if (error != KERN_SUCCESS) {
+    printf("Error: Could not read cpu host statistics.\n");
+    return;
+  }
+
+  if (cpu->has_prev_load) {
+    uint32_t delta_user = cpu->load.cpu_ticks[CPU_STATE_USER]
+                          - cpu->prev_load.cpu_ticks[CPU_STATE_USER];
+
+    uint32_t delta_system = cpu->load.cpu_ticks[CPU_STATE_SYSTEM]
+                            - cpu->prev_load.cpu_ticks[CPU_STATE_SYSTEM];
+
+    uint32_t delta_idle = cpu->load.cpu_ticks[CPU_STATE_IDLE]
+                          - cpu->prev_load.cpu_ticks[CPU_STATE_IDLE];
+
+    cpu->user_load = (double)delta_user / (double)(delta_system
+                                                     + delta_user
+                                                     + delta_idle) * 100.0;
+
+    cpu->sys_load = (double)delta_system / (double)(delta_system
+                                                      + delta_user
+                                                      + delta_idle) * 100.0;
+
+    cpu->total_load = cpu->user_load + cpu->sys_load;
+  }
+
+  cpu->prev_load = cpu->load;
+  cpu->has_prev_load = true;
+}

dot_config/sketchybar/helpers/event_providers/cpu_load/cpu_load.c

@@ -0,0 +1,41 @@
+#include "cpu.h"
+#include "../sketchybar.h"
+
+int main (int argc, char** argv) {
+  float update_freq;
+  if (argc < 3 || (sscanf(argv[2], "%f", &update_freq) != 1)) {
+    printf("Usage: %s \"<event-name>\" \"<event_freq>\"\n", argv[0]);
+    exit(1);
+  }
+
+  alarm(0);
+  struct cpu cpu;
+  cpu_init(&cpu);
+
+  // Setup the event in sketchybar
+  char event_message[512];
+  snprintf(event_message, 512, "--add event '%s'", argv[1]);
+  sketchybar(event_message);
+
+  char trigger_message[512];
+  for (;;) {
+    // Acquire new info
+    cpu_update(&cpu);
+
+    // Prepare the event message
+    snprintf(trigger_message,
+             512,
+             "--trigger '%s' user_load='%d' sys_load='%02d' total_load='%02d'",
+             argv[1],
+             cpu.user_load,
+             cpu.sys_load,
+             cpu.total_load                                        );
+
+    // Trigger the event
+    sketchybar(trigger_message);
+
+    // Wait
+    usleep(update_freq * 1000000);
+  }
+  return 0;
+}

dot_config/sketchybar/helpers/event_providers/cpu_load/makefile

@@ -0,0 +1,5 @@
+bin/cpu_load: cpu_load.c cpu.h ../sketchybar.h | bin
+	clang -std=c99 -O3 $< -o $@
+
+bin:
+	mkdir bin