66 lines
1.4 KiB
C
66 lines
1.4 KiB
C
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#include <sys/mman.h>
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#include <sys/inotify.h>
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#include <unistd.h>
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#include <limits.h> // for NAME_MAX
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internal
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void os_open_and_map_file(const char *fname, App_State &app)
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{
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FILE *file = fopen(fname, "rb");
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int fd = fileno(file);
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size_t fsize = file_size(file);
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void *fmem = mmap(0, fsize, PROT_READ, MAP_SHARED_VALIDATE, fd, 0);
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if (!fmem)
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fprintf(stderr, "Failed to open file %s\n", fname);
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app.inspected_file = file;
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app.inspected_file_size = fsize;
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app.inspected_fmem = reinterpret_cast<u8*>(fmem);
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}
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internal
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void os_unmap_file(u8 *&mem, u64 size)
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{
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if (mem) munmap(mem, size);
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mem = nullptr;
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}
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internal
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void os_start_file_watch(const char *fname, App_State &app)
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{
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int inot = inotify_init1(IN_NONBLOCK);
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if (inot == -1)
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fprintf(stderr, "Failed to init inotify: %s (%d)\n", strerror(errno), errno);
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if (inotify_add_watch(inot, fname, IN_MODIFY) == -1)
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fprintf(stderr, "Failed to add inotify watch: %s (%d)\n", strerror(errno), errno);
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app.inot = inot;
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}
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internal
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void os_stop_file_watch(App_State &app)
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{
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if (app.inot != -1) close(app.inot);
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app.inot = -1;
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}
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internal
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void *os_reserve(u64 size)
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{
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return mmap(0, size, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
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}
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internal
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void os_release(void *mem, u64 size)
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{
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munmap(mem, size);
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}
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internal
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b32x os_commit(void *addr, u64 size)
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{
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return mprotect(addr, size, PROT_READ|PROT_WRITE) == 0;
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}
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